SUSE SLES15 Security Update : kernel (SUSE-SU-2022:2722-1)

##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:2722-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(163995);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/14");

  script_cve_id(
    "CVE-2021-33655",
    "CVE-2022-1462",
    "CVE-2022-21505",
    "CVE-2022-29581",
    "CVE-2022-32250"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2022:2722-1");

  script_name(english:"SUSE SLES15 Security Update : kernel (SUSE-SU-2022:2722-1)");

  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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as
referenced in the SUSE-SU-2022:2722-1 advisory.

  - When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of
    bounds. (CVE-2021-33655)

  - An out-of-bounds read flaw was found in the Linux kernel's TeleTYpe subsystem. The issue occurs in how a
    user triggers a race condition using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage
    of memory in the flush_to_ldisc function. This flaw allows a local user to crash the system or read
    unauthorized random data from memory. (CVE-2022-1462)

  - A bug in the IMA subsystem was discovered which would incorrectly allow kexec to be used when kernel
    lockdown was enabled (CVE-2022-21505) (CVE-2022-21505)

  - Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to
    cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14
    and later versions. (CVE-2022-29581)

  - net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create
    user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to
    a use-after-free. (CVE-2022-32250)

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://bugzilla.suse.com/1190256");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1190497");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198410");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198829");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199086");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199291");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199364");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199665");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199670");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200015");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200465");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200494");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200644");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200651");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201258");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201323");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201381");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201391");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201427");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201458");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201471");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201524");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201592");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201593");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201595");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201596");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201635");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201651");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201675");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201691");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201705");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201725");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201846");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201930");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201954");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201958");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-33655");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1462");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-21505");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-29581");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-32250");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-August/011834.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5085422");
  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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-32250");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/05/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-devel-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-source-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms-azure");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  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/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES15|SLES_SAP15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES15 / SLES_SAP15', '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 service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP4", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP4", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'kernel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-azure-devel-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-azure-devel-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-devel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-source-azure-5.14.21-150400.14.10.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-syms-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-syms-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'kernel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-azure-devel-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-azure-devel-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-devel-azure-5.14.21-150400.14.10.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-source-azure-5.14.21-150400.14.10.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-syms-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']},
    {'reference':'kernel-syms-azure-5.14.21-150400.14.10.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-public-cloud-release-15.4', 'sles-release-15.4']}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach var 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) {
      var check_flag = 0;
      foreach var check (exists_check) {
        if (!rpm_exists(release:_release, rpm:check)) continue;
        check_flag++;
      }
      if (!check_flag) continue;
    }
    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_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-azure / kernel-azure-devel / kernel-devel-azure / etc');
}