EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402) - Nessus

High   Plugin ID: 159861

This page contains detailed information about the EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 159861
Name: EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402)
Filename: EulerOS_SA-2022-1402.nasl
Vulnerability Published: 2021-08-08
This Plugin Published: 2022-04-18
Last Modification Time: 2022-04-26
Plugin Version: 1.3
Plugin Type: local
Plugin Family: Huawei Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version, Host/local_checks_enabled

Vulnerability Information

Severity: High
Vulnerability Published: 2021-08-08
Patch Published: 2022-04-13
CVE [?]: CVE-2021-0920, CVE-2021-0941, CVE-2021-3635, CVE-2021-3669, CVE-2021-3744, CVE-2021-3764, CVE-2021-4002, CVE-2021-4037, CVE-2021-4083, CVE-2021-4135, CVE-2021-4157, CVE-2021-20321, CVE-2021-20322, CVE-2021-38209, CVE-2021-41864, CVE-2021-42739, CVE-2021-43389, CVE-2021-43975
CPE [?]: cpe:/o:huawei:euleros:uvp:2.10.0, p-cpe:/a:huawei:euleros:kernel, p-cpe:/a:huawei:euleros:kernel-abi-stablelists, p-cpe:/a:huawei:euleros:kernel-tools, p-cpe:/a:huawei:euleros:kernel-tools-libs, p-cpe:/a:huawei:euleros:python3-perf

Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

- In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel (CVE-2021-0920)

- In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References: Upstream kernel (CVE-2021-0941)

- A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system. (CVE-2021-20321)

- A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. (CVE-2021-20322)

- A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands. (CVE-2021-3635)

- A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808. (CVE-2021-3744)

- net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls. (CVE-2021-38209)

- A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

- A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)

- An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system. (CVE-2021-4157)

- prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write. (CVE-2021-41864)

- A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-42739)

- An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in the detach_capi_ctr function in drivers/isdn/capi/kcapi.c. (CVE-2021-43389)

- In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value. (CVE-2021-43975)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected kernel packages.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402) vulnerability:

  1. GitHub: https://github.com/enterprisemodules/vulnerability_demo
    [CVE-2021-0920]
  2. GitHub: https://github.com/JaskaranNarula/Host_Errata_Info
    [CVE-2021-42739]

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-2021-4157
CVSS V2 Vector: AV:A/AC:M/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C
CVSS Base Score:7.4 (High)
Impact Subscore:10.0
Exploitability Subscore:4.4
CVSS Temporal Score:5.8 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:5.8 (Medium)
CVSS V3 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS Base Score:8.0 (High)
Impact Subscore:5.9
Exploitability Subscore:2.1
CVSS Temporal Score:7.2 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:7.2 (High)

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Plugin Source

This is the EulerOS_SA-2022-1402.nasl nessus plugin source code. This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof. 

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
##

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

if (description)
{
  script_id(159861);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/26");

  script_cve_id(
    "CVE-2021-0920",
    "CVE-2021-0941",
    "CVE-2021-3635",
    "CVE-2021-3669",
    "CVE-2021-3744",
    "CVE-2021-3764",
    "CVE-2021-4002",
    "CVE-2021-4037",
    "CVE-2021-4083",
    "CVE-2021-4135",
    "CVE-2021-4157",
    "CVE-2021-20321",
    "CVE-2021-20322",
    "CVE-2021-38209",
    "CVE-2021-41864",
    "CVE-2021-42739",
    "CVE-2021-43389",
    "CVE-2021-43975"
  );

  script_name(english:"EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host
is affected by the following vulnerabilities :

  - In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This
    could lead to local escalation of privilege with System execution privileges needed. User interaction is
    not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References:
    Upstream kernel (CVE-2021-0920)

  - In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This
    could lead to local escalation of privilege with System execution privileges needed. User interaction is
    not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References:
    Upstream kernel (CVE-2021-0941)

  - A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users
    do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
    (CVE-2021-20321)

  - A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux
    kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an
    off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this
    vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source
    port randomization are indirectly affected as well. (CVE-2021-20322)

  - A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with
    root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands.
    (CVE-2021-3635)

  - A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in
    drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption).
    This vulnerability is similar with the older CVE-2019-18808. (CVE-2021-3744)

  - net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in
    any net namespace because these changes are leaked into all other net namespaces. This is related to the
    NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls. (CVE-2021-38209)

  - A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some
    regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the
    memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

  - A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket
    file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race
    condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
    This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)

  - An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in
    the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could
    potentially use this flaw to crash the system or escalate privileges on the system. (CVE-2021-4157)

  - prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows
    unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds
    write. (CVE-2021-41864)

  - A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user
    calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or
    escalate privileges on the system. The highest threat from this vulnerability is to confidentiality,
    integrity, as well as system availability. (CVE-2021-42739)

  - An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in
    the detach_capi_ctr function in drivers/isdn/capi/kcapi.c. (CVE-2021-43389)

  - In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in
    drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a
    crafted device) to trigger an out-of-bounds write via a crafted length value. (CVE-2021-43975)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security
advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional
issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2022-1402
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?395f15b5");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-4157");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/04/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-abi-stablelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.10.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.10.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.10.0");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "kernel-4.18.0-147.5.2.5.h781.eulerosv2r10",
  "kernel-abi-stablelists-4.18.0-147.5.2.5.h781.eulerosv2r10",
  "kernel-tools-4.18.0-147.5.2.5.h781.eulerosv2r10",
  "kernel-tools-libs-4.18.0-147.5.2.5.h781.eulerosv2r10",
  "python3-perf-4.18.0-147.5.2.5.h781.eulerosv2r10"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel");
}

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

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/EulerOS_SA-2022-1402.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\EulerOS_SA-2022-1402.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/EulerOS_SA-2022-1402.nasl

Go back to menu.

How to Run

Here is how to run the EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Huawei Local Security Checks plugin family.
  6. On the right side table select EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2022-1402) plugin ID 159861.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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 EulerOS_SA-2022-1402.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a EulerOS_SA-2022-1402.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - EulerOS_SA-2022-1402.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 EulerOS_SA-2022-1402.nasl -t <IP/HOST>

Go back to menu.

References

See also: Similar and related Nessus plugins:
  • 159353 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:1038-1)
  • 159357 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:1037-1)
  • 159366 - SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2022:1039-1)
  • 159387 - Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-5361-1)
  • 159394 - openSUSE 15 Security Update : kernel (openSUSE-SU-2022:1037-1)
  • 159395 - Ubuntu 20.04 LTS : Linux kernel (Intel IOTG) vulnerabilities (USN-5362-1)
  • 159398 - RHEL 7 : kernel (RHSA-2022:1104)
  • 159460 - openSUSE 15 Security Update : kernel (openSUSE-SU-2022:1039-1)
  • 159579 - Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5368-1)
  • 159595 - RHEL 7 : RHV-H security update (redhat-virtualization-host) 4.3.22 (Important) (RHSA-2022:1263)
  • 159627 - EulerOS 2.0 SP8 : kernel (EulerOS-SA-2022-1366)
  • 159691 - RHEL 7 : kernel (RHSA-2022:1324)
  • 159729 - Ubuntu 20.04 LTS : Linux kernel (BlueField) vulnerabilities (USN-5377-1)
  • 159731 - RHEL 7 : kpatch-patch (RHSA-2022:1373)
  • 159748 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:1197-1)
  • 159815 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2022-1429)
  • 159840 - EulerOS Virtualization 2.10.1 : kernel (EulerOS-SA-2022-1376)
  • 159901 - RHEL 8 : kernel-rt (RHSA-2022:1413)
  • 159908 - RHEL 6 : kernel (RHSA-2022:1417)
  • 159913 - RHEL 8 : kpatch-patch (RHSA-2022:1418)
  • 159931 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:1257-1)
  • 160035 - EulerOS 2.0 SP10 : kernel (EulerOS-SA-2022-1475)
  • 160037 - RHEL 8 : kernel (RHSA-2022:1455)
  • 160118 - EulerOS 2.0 SP5 : kernel (EulerOS-SA-2022-1523)
  • 160189 - Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2022-9314)
  • 160190 - Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2022-9313)
  • 160423 - Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-021)
  • 160432 - Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-006)
  • 160447 - Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-007)
  • 160451 - Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-009)
  • 160495 - Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2022-9348)
  • 160505 - OracleVM 3.4 : kernel-uek (OVMSA-2022-0014)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file EulerOS_SA-2022-1402.nasl version 1.3. For more plugins, visit the Nessus Plugin Library.

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