SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2022:1686-1)

##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:1686-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(161232);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/13");

  script_cve_id(
    "CVE-2018-7755",
    "CVE-2019-20811",
    "CVE-2021-20292",
    "CVE-2021-20321",
    "CVE-2021-38208",
    "CVE-2021-43389",
    "CVE-2022-1011",
    "CVE-2022-1280",
    "CVE-2022-1353",
    "CVE-2022-1419",
    "CVE-2022-1516",
    "CVE-2022-28356",
    "CVE-2022-28748"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2022:1686-1");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2022:1686-1)");

  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 SLED12 / SLED_SAP12 / SLES12 / SLES_SAP12 host has packages installed that are affected by
multiple vulnerabilities as referenced in the SUSE-SU-2022:1686-1 advisory.

  - An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel
    through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM
    ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the
    location of kernel code and data and bypass kernel security protections such as KASLR. (CVE-2018-7755)

  - An issue was discovered in the Linux kernel before 5.0.6. In rx_queue_add_kobject() and
    netdev_queue_add_kobject() in net/core/net-sysfs.c, a reference count is mishandled, aka CID-a3e23f719f5c.
    (CVE-2019-20811)

  - There is a flaw reported in the Linux kernel in versions before 5.9 in
    drivers/gpu/drm/nouveau/nouveau_sgdma.c in nouveau_sgdma_create_ttm in Nouveau DRM subsystem. The issue
    results from the lack of validating the existence of an object prior to performing operations on the
    object. An attacker with a local account with a root privilege, can leverage this vulnerability to
    escalate privileges and execute code in the context of the kernel. (CVE-2021-20292)

  - 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)

  - net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial
    of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure
    of a bind call. (CVE-2021-38208)

  - 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)

  - A use-after-free flaw was found in the Linux kernel's FUSE filesystem in the way a user triggers write().
    This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in
    privilege escalation. (CVE-2022-1011)

  - A use-after-free vulnerability was found in drm_lease_held in drivers/gpu/drm/drm_lease.c in the Linux
    kernel due to a race problem. This flaw allows a local user privilege attacker to cause a denial of
    service (DoS) or a kernel information leak. (CVE-2022-1280)

  - A vulnerability was found in the pfkey_register function in net/key/af_key.c in the Linux kernel. This
    flaw allows a local, unprivileged user to gain access to kernel memory, leading to a system crash or a
    leak of internal kernel information. (CVE-2022-1353)

  - The root cause of this vulnerability is that the ioctl$DRM_IOCTL_MODE_DESTROY_DUMB can decrease refcount
    of *drm_vgem_gem_object *(created in *vgem_gem_dumb_create*) concurrently, and *vgem_gem_dumb_create *will
    access the freed drm_vgem_gem_object. (CVE-2022-1419)

  - A NULL pointer dereference flaw was found in the Linux kernel's X.25 set of standardized network protocols
    functionality in the way a user terminates their session using a simulated Ethernet card and continued
    usage of this connection. This flaw allows a local user to crash the system. (CVE-2022-1516)

  - In the Linux kernel before 5.17.1, a refcount leak bug was found in net/llc/af_llc.c. (CVE-2022-28356)

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/1028340");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1071995");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1084513");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1114648");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1121726");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1129770");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1137728");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1172456");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1183723");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1187055");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1191647");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1191958");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1194625");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1196018");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1196247");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197075");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197343");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197391");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197663");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197888");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197914");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198217");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198413");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198516");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198687");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198742");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198825");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198989");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199012");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-7755");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-20811");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-20292");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-20321");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-38208");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-43389");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1011");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1280");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1353");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1419");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1516");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28356");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28748");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-May/011035.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?86c8f76b");
  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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20292");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-1419");

  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:"2018/03/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/05/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:cluster-md-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dlm-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gfs2-kmp-default");
  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-default-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-kgraft");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-kgraft-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-man");
  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-obs-build");
  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:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-122_121-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:ocfs2-kmp-default");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  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:"^(SLED12|SLED_SAP12|SLES12|SLES_SAP12)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLED12 / SLED_SAP12 / SLES12 / SLES_SAP12', '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 == "SLED12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED12 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLED_SAP12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED_SAP12 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLES12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES12 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP12 SP5", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'cluster-md-kmp-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE-HPC-release-12.5', 'sle-ha-release-12.5', 'sles-release-12.5']},
    {'reference':'dlm-kmp-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE-HPC-release-12.5', 'sle-ha-release-12.5', 'sles-release-12.5']},
    {'reference':'gfs2-kmp-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE-HPC-release-12.5', 'sle-ha-release-12.5', 'sles-release-12.5']},
    {'reference':'ocfs2-kmp-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE-HPC-release-12.5', 'sle-ha-release-12.5', 'sles-release-12.5']},
    {'reference':'kernel-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-base-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-devel-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-extra-4.12.14-122.121.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLED_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-extra-4.12.14-122.121.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-man-4.12.14-122.121.2', 'sp':'5', 'cpu':'s390x', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-devel-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-macros-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-obs-build-4.12.14-122.121.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-source-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-syms-4.12.14-122.121.2', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'kernel-default-kgraft-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-live-patching-release-12.5']},
    {'reference':'kernel-default-kgraft-devel-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-live-patching-release-12.5']},
    {'reference':'kgraft-patch-4_12_14-122_121-default-1-8.5.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-live-patching-release-12.5']},
    {'reference':'kernel-obs-build-4.12.14-122.121.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-sdk-release-12.5', 'sles-release-12.5']},
    {'reference':'kernel-default-extra-4.12.14-122.121.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLED12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-we-release-12.5', 'sled-release-12.5', 'sles-release-12.5']},
    {'reference':'kernel-default-extra-4.12.14-122.121.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-we-release-12.5', 'sled-release-12.5', 'sles-release-12.5']},
    {'reference':'kernel-default-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-default-base-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-default-devel-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-default-man-4.12.14-122.121.2', 'sp':'5', 'cpu':'s390x', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-devel-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-macros-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-source-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'kernel-syms-4.12.14-122.121.2', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']}
];

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, 'cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc');
}