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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.NEWSTART_CGSL_NS-SA-2023-0107_KERNEL.NASL
HistoryDec 27, 2023 - 12:00 a.m.

NewStart CGSL MAIN 6.02 : kernel Multiple Vulnerabilities (NS-SA-2023-0107)

2023-12-2700:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
14
vulnerability
newstart cgsl
main 6.02
kernel
linux
inode.c
perf_event_open()
cve-2021-4037
cve-2022-1729
root privileges

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

AI Score

Confidence

Low

0.0005 Low

EPSS

Percentile

18.2%

The remote NewStart CGSL host, running version MAIN 6.02, has kernel packages installed that are affected by multiple vulnerabilities:

  • A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS. (CVE-2021-4037)

  • A race condition was found the Linux kernel in perf_event_open() which can be exploited by an unprivileged user to gain root privileges. The bug allows to build several exploit primitives such as kernel address information leak, arbitrary execution, etc. (CVE-2022-1729)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2023-0107. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(187363);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/27");

  script_cve_id("CVE-2021-4037", "CVE-2022-1729");

  script_name(english:"NewStart CGSL MAIN 6.02 : kernel Multiple Vulnerabilities (NS-SA-2023-0107)");

  script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version MAIN 6.02, has kernel packages installed that are affected by multiple
vulnerabilities:

  - A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that
    allows local users to create files for the XFS file-system with an unintended group ownership and with
    group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a
    certain group and is writable by a user who is not a member of this group. This can lead to excessive
    permissions granted in case when they should not. This vulnerability is similar to the previous
    CVE-2018-13405 and adds the missed fix for the XFS. (CVE-2021-4037)

  - A race condition was found the Linux kernel in perf_event_open() which can be exploited by an unprivileged
    user to gain root privileges. The bug allows to build several exploit primitives such as kernel address
    information leak, arbitrary execution, etc. (CVE-2022-1729)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/notice/NS-SA-2023-0107");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2021-4037");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2022-1729");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL kernel packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/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-2021-4037");

  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:"2022/05/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:bpftool-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:python3-perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:python3-perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('rpm.inc');

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

var os_release = get_kb_item('Host/ZTE-CGSL/release');
if (isnull(os_release) || os_release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, 'NewStart Carrier Grade Server Linux');

if (os_release !~ "CGSL MAIN 6.02")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 6.02');

if (!get_kb_item('Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'NewStart Carrier Grade Server Linux', cpu);

var flag = 0;

var pkgs = {
  'CGSL MAIN 6.02': [
    'bpftool-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'bpftool-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-core-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-debug-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-debuginfo-common-x86_64-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-devel-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-headers-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-modules-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-modules-extra-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-tools-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-tools-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'kernel-tools-libs-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'perf-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'perf-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'python3-perf-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece',
    'python3-perf-debuginfo-4.18.0-193.14.2.el8_2.cgslv6_2.667.2.g8fbbf5ece'
  ]
};
var pkg_list = pkgs[os_release];

foreach (pkg in pkg_list)
  if (rpm_check(release:'ZTE ' + os_release, reference:pkg)) 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');
}
VendorProductVersionCPE
ztecgsl_mainbpftoolp-cpe:/a:zte:cgsl_main:bpftool
ztecgsl_mainbpftool-debuginfop-cpe:/a:zte:cgsl_main:bpftool-debuginfo
ztecgsl_mainkernelp-cpe:/a:zte:cgsl_main:kernel
ztecgsl_mainkernel-corep-cpe:/a:zte:cgsl_main:kernel-core
ztecgsl_mainkernel-debug-debuginfop-cpe:/a:zte:cgsl_main:kernel-debug-debuginfo
ztecgsl_mainkernel-debuginfop-cpe:/a:zte:cgsl_main:kernel-debuginfo
ztecgsl_mainkernel-debuginfo-common-x86_64p-cpe:/a:zte:cgsl_main:kernel-debuginfo-common-x86_64
ztecgsl_mainkernel-develp-cpe:/a:zte:cgsl_main:kernel-devel
ztecgsl_mainkernel-headersp-cpe:/a:zte:cgsl_main:kernel-headers
ztecgsl_mainkernel-modulesp-cpe:/a:zte:cgsl_main:kernel-modules
Rows per page:
1-10 of 191

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

AI Score

Confidence

Low

0.0005 Low

EPSS

Percentile

18.2%