Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) - Nessus

Medium Plugin ID: 150292

This page contains detailed information about the Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

hide

Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 150292
Name: Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1)
Filename: ubuntu_USN-4984-1.nasl
Vulnerability Published: 2021-03-05
This Plugin Published: 2021-06-04
Last Modification Time: 2021-06-04
Plugin Version: 1.2
Plugin Type: local
Plugin Family: Ubuntu Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Vulnerability Information

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS / 20.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4984-1 advisory.

- A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected (CVE-2021-3483)

- An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931. (CVE-2021-28038)

- rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6 allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases, CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

- The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

- An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A stall on CPU can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1. (CVE-2021-28950)

- An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This has been fixed in 5.12-rc4.) (CVE-2021-28952)

- A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

- In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS status in a PEBS record is mishandled, aka CID-d88d05a9e0b6. (CVE-2021-28971)

- In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8. (CVE-2021-28972)

- An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure, aka CID-50535249f624. (CVE-2021-29647)

- An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b. (CVE-2021-30002)

- An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi- device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability. (CVE-2021-31916)

- The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value. (CVE-2021-33033)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) vulnerability:

GitHub: https://github.com/JamesGeee/CVE-2021-31916
[CVE-2021-31916: PoC for exploiting CVE-2021-31916]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2021-28972
CVSS V2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	5.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.3 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS Base Score:	6.7 (Medium)
Impact Subscore:	5.9
Exploitability Subscore:	0.8
CVSS Temporal Score:	5.8 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.8 (Medium)

Go back to menu.

Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4984-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(150292);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/04");

  script_cve_id(
    "CVE-2021-3483",
    "CVE-2021-28038",
    "CVE-2021-28660",
    "CVE-2021-28688",
    "CVE-2021-28950",
    "CVE-2021-28952",
    "CVE-2021-28964",
    "CVE-2021-28971",
    "CVE-2021-28972",
    "CVE-2021-29647",
    "CVE-2021-30002",
    "CVE-2021-31916",
    "CVE-2021-33033"
  );
  script_xref(name:"USN", value:"4984-1");

  script_name(english:"Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 20.10 host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-4984-1 advisory.

  - A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice
    into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest
    threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions
    before kernel 5.12-rc6 are affected (CVE-2021-3483)

  - An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the
    netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of
    changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior
    of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
    (CVE-2021-28038)

  - rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6
    allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases,
    CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may
    have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use
    uninitialized or stale values. This initialization went too far and may under certain conditions also
    overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking
    persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,
    leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A stall on CPU can occur
    because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1. (CVE-2021-28950)

  - An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device
    driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This
    has been fixed in 5.12-rc4.) (CVE-2021-28952)

  - A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It
    allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer
    before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

  - In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some
    Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS
    status in a PEBS record is mishandled, aka CID-d88d05a9e0b6. (CVE-2021-28971)

  - In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has
    a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing
    userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and
    remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8. (CVE-2021-28972)

  - An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows
    attackers to obtain sensitive information from kernel memory because of a partially uninitialized data
    structure, aka CID-50535249f624. (CVE-2021-29647)

  - An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in
    drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.
    (CVE-2021-30002)

  - An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-
    device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with
    special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or
    a leak of internal kernel information. The highest threat from this vulnerability is to system
    availability. (CVE-2021-31916)

  - The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because
    the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads
    to writing an arbitrary value. (CVE-2021-33033)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4984-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-28972");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1028-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1031-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1032-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1033-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1035-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-55-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-55-generic-64k");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-55-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-55-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04-edge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04-edge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04-edge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-gke");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04-edge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04-edge");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2021 Canonical, Inc. / NASL script (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
include('ubuntu.inc');
include('ksplice.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item('Host/Ubuntu/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
release = chomp(release);
if (! preg(pattern:"^(20\.04|20\.10)$", string:release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 20.10', 'Ubuntu ' + release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  cve_list = make_list('CVE-2021-3483', 'CVE-2021-28038', 'CVE-2021-28660', 'CVE-2021-28688', 'CVE-2021-28950', 'CVE-2021-28952', 'CVE-2021-28964', 'CVE-2021-28971', 'CVE-2021-28972', 'CVE-2021-29647', 'CVE-2021-30002', 'CVE-2021-31916', 'CVE-2021-33033');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4984-1');
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

pkgs = [
    {'osver': '20.04', 'pkgname': 'linux-image-5.8.0-55-generic', 'pkgver': '5.8.0-55.62~20.04.1'},
    {'osver': '20.04', 'pkgname': 'linux-image-5.8.0-55-generic-64k', 'pkgver': '5.8.0-55.62~20.04.1'},
    {'osver': '20.04', 'pkgname': 'linux-image-5.8.0-55-generic-lpae', 'pkgver': '5.8.0-55.62~20.04.1'},
    {'osver': '20.04', 'pkgname': 'linux-image-5.8.0-55-lowlatency', 'pkgver': '5.8.0-55.62~20.04.1'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-64k-hwe-20.04', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-64k-hwe-20.04-edge', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-hwe-20.04', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-hwe-20.04-edge', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-lpae-hwe-20.04', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-generic-lpae-hwe-20.04-edge', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-lowlatency-hwe-20.04', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-lowlatency-hwe-20.04-edge', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-virtual-hwe-20.04', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.04', 'pkgname': 'linux-image-virtual-hwe-20.04-edge', 'pkgver': '5.8.0.55.62~20.04.39'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-1028-kvm', 'pkgver': '5.8.0-1028.30'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-1031-oracle', 'pkgver': '5.8.0-1031.32'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-1032-gcp', 'pkgver': '5.8.0-1032.34'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-1033-azure', 'pkgver': '5.8.0-1033.35'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-1035-aws', 'pkgver': '5.8.0-1035.37'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-55-generic', 'pkgver': '5.8.0-55.62'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-55-generic-64k', 'pkgver': '5.8.0-55.62'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-55-generic-lpae', 'pkgver': '5.8.0-55.62'},
    {'osver': '20.10', 'pkgname': 'linux-image-5.8.0-55-lowlatency', 'pkgver': '5.8.0-55.62'},
    {'osver': '20.10', 'pkgname': 'linux-image-aws', 'pkgver': '5.8.0.1035.37'},
    {'osver': '20.10', 'pkgname': 'linux-image-azure', 'pkgver': '5.8.0.1033.33'},
    {'osver': '20.10', 'pkgname': 'linux-image-gcp', 'pkgver': '5.8.0.1032.32'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-64k', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-64k-hwe-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-64k-hwe-20.04-edge', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-hwe-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-hwe-20.04-edge', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-lpae', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-lpae-hwe-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-generic-lpae-hwe-20.04-edge', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-gke', 'pkgver': '5.8.0.1032.32'},
    {'osver': '20.10', 'pkgname': 'linux-image-kvm', 'pkgver': '5.8.0.1028.30'},
    {'osver': '20.10', 'pkgname': 'linux-image-lowlatency', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-lowlatency-hwe-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-lowlatency-hwe-20.04-edge', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-oem-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-oracle', 'pkgver': '5.8.0.1031.30'},
    {'osver': '20.10', 'pkgname': 'linux-image-virtual', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-virtual-hwe-20.04', 'pkgver': '5.8.0.55.60'},
    {'osver': '20.10', 'pkgname': 'linux-image-virtual-hwe-20.04-edge', 'pkgver': '5.8.0.55.60'}
];

flag = 0;
foreach package_array ( pkgs ) {
  osver = NULL;
  pkgname = NULL;
  pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'linux-image-5.8.0-1028-kvm / linux-image-5.8.0-1031-oracle / etc');
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/ubuntu_USN-4984-1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\ubuntu_USN-4984-1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/ubuntu_USN-4984-1.nasl

Go back to menu.

How to Run

Here is how to run the Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Ubuntu Local Security Checks plugin family.
On the right side table select Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) plugin ID 150292.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl ubuntu_USN-4984-1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a ubuntu_USN-4984-1.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - ubuntu_USN-4984-1.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state ubuntu_USN-4984-1.nasl -t <IP/HOST>

Go back to menu.

References

USN | Ubuntu Security Notice:

4984-1

See also:

Similar and related Nessus plugins:

149098 - EulerOS 2.0 SP3 : kernel (EulerOS-SA-2021-1808)
149407 - Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4948-1)
149456 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1572-1)
149462 - SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1573-1)
149487 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1595-1)
149491 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1596-1)
149605 - openSUSE Security Update : the Linux Kernel (openSUSE-2021-579)
149607 - EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-1879)
149633 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1617-1)
149716 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1623-1)
149717 - SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1624-1)
149872 - Amazon Linux AMI : kernel (ALAS-2021-1503)
149892 - openSUSE Security Update : the Linux Kernel (openSUSE-2021-758)
150155 - Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4979-1)
150233 - Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4982-1)
150253 - EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-1971)
150271 - EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1967)
150305 - SUSE SLES12 Security Update : kernel (Live Patch 38 for SLE 12 SP3) (SUSE-SU-2021:1870-1)
150313 - SUSE SLES12 Security Update : kernel (Live Patch 36 for SLE 12 SP3) (SUSE-SU-2021:1865-1)
150550 - SUSE SLES11 Security Update : kernel (SUSE-SU-2021:14724-1)
150778 - Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9306)
150782 - Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9308)
150783 - Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9307)
150784 - Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9305)
150901 - SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:1977-1)
150927 - SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1975-1)
150928 - SUSE SLES12 Security Update : kernel (Live Patch 39 for SLE 12 SP3) (SUSE-SU-2021:2026-1)
150984 - Debian DLA-2690-1 : linux-4.19 security update
150985 - Debian DLA-2689-1 : linux security update
151042 - EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-1983)
151167 - EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2021-2002)
151206 - SUSE SLES15 Security Update : kernel (Live Patch 0 for SLE 15 SP3) (SUSE-SU-2021:2198-1)
151229 - EulerOS Virtualization 3.0.6.6 : kernel (EulerOS-SA-2021-2040)
151238 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2051)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file ubuntu_USN-4984-1.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

Go back to menu.

Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4984-1) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

Nessus Plugin Library

Solving Problems with Office 365 Email from GoDaddy

Empire Module Library

CrackMapExec Module Library

Metasploit Android Modules

Top 16 Active Directory Vulnerabilities

Top 10 Vulnerabilities: Internal Infrastructure Pentest

Terminal Escape Injection

Cisco Password Cracking and Decrypting Guide

Capture Passwords using Wireshark

SSH Brute Force Attack Tool using PuTTY / Plink (ssh-putty-brute.ps1)

SMB Brute Force Attack Tool in PowerShell (SMBLogin.ps1)

Port Scanner in PowerShell (TCP/UDP)

Nessus CSV Parser and Extractor

Default Password Scanner (default-http-login-hunter.sh)