SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) - Nessus

Medium Plugin ID: 158756

This page contains detailed information about the SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 158756
Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1)
Filename: suse_SU-2022-0756-1.nasl
Vulnerability Published: 2019-08-19
This Plugin Published: 2022-03-09
Last Modification Time: 2022-03-09
Plugin Version: 1.2
Plugin Type: local
Plugin Family: SuSE Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/SuSE/release, Host/SuSE/rpm-list

Vulnerability Information

Severity: Medium
Vulnerability Published: 2019-08-19
Patch Published: 2022-03-08
CVE [?]: CVE-2016-10905, CVE-2021-0920, CVE-2022-0001, CVE-2022-0002, CVE-2022-0492, CVE-2022-0617, CVE-2022-24448
CPE [?]: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-devel, p-cpe:/a:novell:suse_linux:kernel-macros, p-cpe:/a:novell:suse_linux:kernel-source, p-cpe:/a:novell:suse_linux:kernel-syms

Synopsis

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

Description

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0756-1 advisory.

- An issue was discovered in fs/gfs2/rgrp.c in the Linux kernel before 4.8. A use-after-free is caused by the functions gfs2_clear_rgrpd and read_rindex_entry. (CVE-2016-10905)

- 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)

- Amazon Linux has been made aware of a potential Branch Target Injection (BTI) issue (sometimes referred to as Spectre variant 2). This is a known cross-domain transient execution attack where a third party may seek to cause a disclosure gadget to be speculatively executed after an indirect branch prediction. Generally, actors who attempt transient execution attacks do not have access to the data on the hosts they attempt to access (e.g. where privilege-level isolation is in place). For such attacks to succeed, actors need to be able to run code on the (virtual) machine hosting the data in which they are interested. (CVE-2022-0001, CVE-2022-0002)

- A vulnerability was found in the Linux kernel's cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly. (CVE-2022-0492)

- A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)

- An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. If an application sets the O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file descriptor. (CVE-2022-24448)

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 SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) vulnerability:

GitHub: https://github.com/enterprisemodules/vulnerability_demo
[CVE-2021-0920]
GitHub: https://github.com/SofianeHamlaoui/CVE-2022-0492-Checker
[CVE-2022-0492: A script to check if a container environment is vulnerable to container escapes via ...]
GitHub: https://github.com/chenaotian/CVE-2022-0492
[CVE-2022-0492: CVE-2022-0492 EXP and Analysis write up]
GitHub: https://github.com/puckiestyle/CVE-2022-0492
[CVE-2022-0492]
GitHub: https://github.com/PaloAltoNetworks/can-ctr-escape-cve-2022-0492
[CVE-2022-0492: Test whether a container environment is vulnerable to container escapes via ...]

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-2021-0920
CVSS V2 Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	6.9 (Medium)
Impact Subscore:	10.0
Exploitability Subscore:	3.4
CVSS Temporal Score:	5.1 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.1 (Medium)

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

CVSS Base Score:	6.4 (Medium)
Impact Subscore:	5.9
Exploitability Subscore:	0.5
CVSS Temporal Score:	5.6 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.6 (Medium)

Go back to menu.

Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:0756-1. The text itself
# is copyright (C) SUSE.
##

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

if (description)
{
  script_id(158756);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/09");

  script_cve_id(
    "CVE-2016-10905",
    "CVE-2021-0920",
    "CVE-2022-0001",
    "CVE-2022-0002",
    "CVE-2022-0492",
    "CVE-2022-0617",
    "CVE-2022-24448"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2022:0756-1");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in
the SUSE-SU-2022:0756-1 advisory.

  - An issue was discovered in fs/gfs2/rgrp.c in the Linux kernel before 4.8. A use-after-free is caused by
    the functions gfs2_clear_rgrpd and read_rindex_entry. (CVE-2016-10905)

  - 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)

  - Amazon Linux has been made aware of a potential Branch Target Injection (BTI) issue (sometimes referred to
    as Spectre variant 2). This is a known cross-domain transient execution attack where a third party may
    seek to cause a disclosure gadget to be speculatively executed after an indirect branch prediction.
    Generally, actors who attempt transient execution attacks do not have access to the data on the hosts they
    attempt to access (e.g. where privilege-level isolation is in place). For such attacks to succeed, actors
    need to be able to run code on the (virtual) machine hosting the data in which they are interested.
    (CVE-2022-0001, CVE-2022-0002)

  - A vulnerability was found in the Linux kernel's cgroup_release_agent_write in the
    kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups
    v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.
    (CVE-2022-0492)

  - A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way
    user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw
    to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2. (CVE-2022-0617)

  - An issue was discovered in fs/nfs/dir.c in the Linux kernel before 5.16.5. If an application sets the
    O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a
    regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file
    descriptor. (CVE-2022-24448)

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://bugzilla.suse.com/1146312");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1190717");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1191580");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1193731");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1194463");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1195543");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1195612");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1195908");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1195939");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1196079");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1196612");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-March/010401.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?906e37e7");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2016-10905");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-0920");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-0001");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-0002");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-0492");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-0617");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-24448");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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:H/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-2021-0920");

  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:"2019/08/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-macros");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE 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", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES12', 'SUSE ' + os_ver);

if (!get_kb_item("Host/SuSE/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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE ' + os_ver, cpu);

var sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + sp);

var pkgs = [
    {'reference':'kernel-default-4.4.121-92.169.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-default-base-4.4.121-92.169.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-default-devel-4.4.121-92.169.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-devel-4.4.121-92.169.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-macros-4.4.121-92.169.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-source-4.4.121-92.169.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'},
    {'reference':'kernel-syms-4.4.121-92.169.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.2'}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var exists_check = NULL;
  var rpm_spec_vers_cmp = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && release) {
    if (exists_check) {
      if (!rpm_exists(release:release, rpm:exists_check)) continue;
      if ('ltss' >< tolower(exists_check)) ltss_caveat_required = TRUE;
    }
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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-default / kernel-default-base / kernel-default-devel / etc');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/suse_SU-2022-0756-1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\suse_SU-2022-0756-1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/suse_SU-2022-0756-1.nasl

Go back to menu.

How to Run

Here is how to run the SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) 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 SuSE Local Security Checks plugin family.
On the right side table select SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) plugin ID 158756.
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 suse_SU-2022-0756-1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a suse_SU-2022-0756-1.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - suse_SU-2022-0756-1.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 suse_SU-2022-0756-1.nasl -t <IP/HOST>

Go back to menu.

References

SuSE Security Advisory:

SUSE-SU-2022:0756-1

See also:

Similar and related Nessus plugins:

158579 - SUSE SLES12 Security Update : kernel (Live Patch 42 for SLE 12 SP3) (SUSE-SU-2022:0668-1)
158682 - Debian DSA-5092-1 : linux - security update
158697 - Amazon Linux AMI : kernel (ALAS-2022-1571)
158720 - Amazon Linux 2 : kernel (ALAS-2022-1761)
158727 - RHEL 8 : kpatch-patch (RHSA-2022:0772)
158731 - Ubuntu 20.04 LTS / 21.10 : Linux kernel vulnerabilities (USN-5317-1)
158735 - RHEL 8 : kernel-rt (RHSA-2022:0771)
158736 - RHEL 8 : kernel (RHSA-2022:0777)
158737 - Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5318-1)
158743 - Slackware Linux 15.0 kernel-generic Multiple Vulnerabilities (SSA:2022-067-01)
158748 - SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0762-1)
158749 - SUSE SLES11 Security Update : kernel (SUSE-SU-2022:14905-1)
158751 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:0768-1)
158752 - SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2022:0767-1)
158753 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:0759-1)
158754 - SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0765-1)
158755 - SUSE SLES15 Security Update : kernel (SUSE-SU-2022:0766-1)
158757 - SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0761-1)
158758 - SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0757-1)
158761 - Debian DSA-5096-1 : linux - security update
158762 - Debian DSA-5095-1 : linux - security update
158774 - openSUSE 15 Security Update : kernel (openSUSE-SU-2022:0755-1)
158777 - openSUSE 15 Security Update : kernel (openSUSE-SU-2022:0760-1)
158779 - openSUSE 15 Security Update : kernel (openSUSE-SU-2022:0768-1)
158794 - Oracle Linux 8 : kernel (ELSA-2022-0825)
158805 - RHEL 8 : kernel (RHSA-2022:0823)
158807 - RHEL 8 : kernel (RHSA-2022:0820)
158808 - RHEL 8 : kernel-rt (RHSA-2022:0819)
158813 - RHEL 8 : kernel-rt (RHSA-2022:0821)
158822 - RHEL 8 : kernel (RHSA-2022:0825)
158842 - Rocky Linux 8 : kernel-rt (RLSA-2022:819)
158877 - Rocky Linux 8 : kernel (RLSA-2022:825)
158912 - RHEL 8 : kpatch-patch (RHSA-2022:0849)
158923 - RHEL 8 : kpatch-patch (RHSA-2022:0851)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file suse_SU-2022-0756-1.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

Go back to menu.

SUSE SLES12 Security Update : kernel (SUSE-SU-2022:0756-1) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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