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nessusThis script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.ORACLELINUX_ELSA-2022-5249.NASL
HistoryJul 07, 2022 - 12:00 a.m.

Oracle Linux 9 : kernel (ELSA-2022-5249)

2022-07-0700:00:00
This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
20
oracle linux 9
vulnerability
privilege escalation
information leak
heap buffer overflow
race condition
kernel.

CVSS2

4.6

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

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.7

Confidence

Low

EPSS

0.001

Percentile

46.7%

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-5249 advisory.

  • A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap objects and may cause a local privilege escalation threat. (CVE-2022-27666)

  • kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729)

  • kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012)

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

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2022-5249.
##

include('compat.inc');

if (description)
{
  script_id(162791);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/16");

  script_cve_id("CVE-2022-1012", "CVE-2022-1729", "CVE-2022-27666");

  script_name(english:"Oracle Linux 9 : kernel (ELSA-2022-5249)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2022-5249 advisory.

  - A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and
    net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap
    objects and may cause a local privilege escalation threat. (CVE-2022-27666)

  - kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729)

  - kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak
    (CVE-2022-1012)

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://linux.oracle.com/errata/ELSA-2022-5249.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-27666");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-1012");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/06/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-abi-stablelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-cross-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel-matched");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel-matched");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:9");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("linux_alt_patch_detect.nasl", "ssh_get_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('ksplice.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 9', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/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, 'Oracle Linux', cpu);

var machine_uptrack_level = get_one_kb_item('Host/uptrack-uname-r');
if (machine_uptrack_level)
{
  var trimmed_uptrack_level = ereg_replace(string:machine_uptrack_level, pattern:"\.(x86_64|i[3-6]86|aarch64)$", replace:'');
  var fixed_uptrack_levels = ['5.14.0-70.17.1.0.1.el9_0'];
  foreach var fixed_uptrack_level ( fixed_uptrack_levels ) {
    if (rpm_spec_vers_cmp(a:trimmed_uptrack_level, b:fixed_uptrack_level) >= 0)
    {
      audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for ELSA-2022-5249');
    }
  }
  __rpm_report = 'Running KSplice level of ' + trimmed_uptrack_level + ' does not meet the minimum fixed level of ' + join(fixed_uptrack_levels, sep:' / ') + ' for this advisory.\n\n';
}

var kernel_major_minor = get_kb_item('Host/uname/major_minor');
if (empty_or_null(kernel_major_minor)) exit(1, 'Unable to determine kernel major-minor level.');
var expected_kernel_major_minor = '5.14';
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, 'running kernel level ' + expected_kernel_major_minor + ', it is running kernel level ' + kernel_major_minor);

var pkgs = [
    {'reference':'bpftool-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'bpftool-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.14.0'},
    {'reference':'kernel-abi-stablelists-5.14.0-70.17.1.0.1.el9_0', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-abi-stablelists-5.14.0'},
    {'reference':'kernel-core-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-core-5.14.0'},
    {'reference':'kernel-cross-headers-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-cross-headers-5.14.0'},
    {'reference':'kernel-cross-headers-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-cross-headers-5.14.0'},
    {'reference':'kernel-debug-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-5.14.0'},
    {'reference':'kernel-debug-core-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-core-5.14.0'},
    {'reference':'kernel-debug-devel-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-devel-5.14.0'},
    {'reference':'kernel-debug-devel-matched-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-devel-matched-5.14.0'},
    {'reference':'kernel-debug-modules-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-modules-5.14.0'},
    {'reference':'kernel-debug-modules-extra-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-modules-extra-5.14.0'},
    {'reference':'kernel-devel-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-5.14.0'},
    {'reference':'kernel-devel-matched-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-matched-5.14.0'},
    {'reference':'kernel-headers-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-5.14.0'},
    {'reference':'kernel-headers-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-5.14.0'},
    {'reference':'kernel-modules-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-5.14.0'},
    {'reference':'kernel-modules-extra-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-modules-extra-5.14.0'},
    {'reference':'kernel-tools-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-5.14.0'},
    {'reference':'kernel-tools-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-5.14.0'},
    {'reference':'kernel-tools-libs-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-5.14.0'},
    {'reference':'kernel-tools-libs-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-5.14.0'},
    {'reference':'kernel-tools-libs-devel-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-devel-5.14.0'},
    {'reference':'kernel-tools-libs-devel-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-tools-libs-devel-5.14.0'},
    {'reference':'perf-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'perf-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python3-perf-5.14.0-70.17.1.0.1.el9_0', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python3-perf-5.14.0-70.17.1.0.1.el9_0', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'EL' + 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['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && release) {
    if (exists_check) {
        if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    } else {
        if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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, 'bpftool / kernel / kernel-abi-stablelists / etc');
}
VendorProductVersionCPE
oraclelinuxkernel-debug-modules-extrap-cpe:/a:oracle:linux:kernel-debug-modules-extra
oraclelinuxkernel-develp-cpe:/a:oracle:linux:kernel-devel
oraclelinuxkernel-devel-matchedp-cpe:/a:oracle:linux:kernel-devel-matched
oraclelinuxkernel-headersp-cpe:/a:oracle:linux:kernel-headers
oraclelinuxkernel-modulesp-cpe:/a:oracle:linux:kernel-modules
oraclelinuxkernel-modules-extrap-cpe:/a:oracle:linux:kernel-modules-extra
oraclelinuxkernel-toolsp-cpe:/a:oracle:linux:kernel-tools
oraclelinuxkernel-tools-libsp-cpe:/a:oracle:linux:kernel-tools-libs
oraclelinuxbpftoolp-cpe:/a:oracle:linux:bpftool
oraclelinuxkernelp-cpe:/a:oracle:linux:kernel
Rows per page:
1-10 of 221

CVSS2

4.6

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

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.7

Confidence

Low

EPSS

0.001

Percentile

46.7%