SUSE SLES12 Security Update : kernel (SUSE-SU-2023:0420-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2023:0420-1. The text itself
# is copyright (C) SUSE.
##

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

if (description)
{
  script_id(171538);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/14");

  script_cve_id(
    "CVE-2018-9517",
    "CVE-2022-3564",
    "CVE-2022-3643",
    "CVE-2022-4662",
    "CVE-2022-42895",
    "CVE-2022-42896",
    "CVE-2022-47929",
    "CVE-2023-23454",
    "CVE-2023-23455"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2023:0420-1");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2023:0420-1)");

  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-2023:0420-1 advisory.

  - In pppol2tp_connect, there is possible memory corruption due to a use after free. This could lead to local
    escalation of privilege with System execution privileges needed. User interaction is not needed for
    exploitation. Product: Android. Versions: Android kernel. Android ID: A-38159931. (CVE-2018-9517)

  - A vulnerability classified as critical was found in Linux Kernel. Affected by this vulnerability is the
    function l2cap_reassemble_sdu of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The
    manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The associated
    identifier of this vulnerability is VDB-211087. (CVE-2022-3564)

  - Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC
    interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It
    appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol
    headers are all contained within the linear section of the SKB and some NICs behave badly if this is not
    the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x)
    though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with
    split headers, netback will forward those violating above mentioned assumption to the networking core,
    resulting in said misbehavior. (CVE-2022-3643)

  - There is an infoleak vulnerability in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_parse_conf_req
    function which can be used to leak kernel pointers remotely. We recommend upgrading past commit
    https://github.com/torvalds/linux/commit/b1a2cd50c0357f243b7435a732b4e62ba3157a2e
    https://www.google.com/url (CVE-2022-42895)

  - There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect
    and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively)
    remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within
    proximity of the victim. We recommend upgrading past commit https://www.google.com/url
    https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4
    https://www.google.com/url (CVE-2022-42896)

  - A flaw incorrect access control in the Linux kernel USB core subsystem was found in the way user attaches
    usb device. A local user could use this flaw to crash the system. (CVE-2022-4662)

  - In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows
    an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control
    configuration that is set up with tc qdisc and tc class commands. This affects qdisc_graft in
    net/sched/sch_api.c. (CVE-2022-47929)

  - cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial
    of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes
    indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)

  - atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial
    of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition
    rather than valid classification results). (CVE-2023-23455)

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/1108488");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1205705");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1205709");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1206073");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1206113");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1206664");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1206677");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1206784");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1207036");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1207125");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1207186");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1207237");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-9517");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-3564");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-3643");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-42895");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-42896");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-4662");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-47929");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-23454");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-23455");
  # https://lists.suse.com/pipermail/sle-security-updates/2023-February/013767.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d2eb4955");
  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:A/AC:L/PR:N/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-2018-9517");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-42896");

  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:"2018/12/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/02/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/02/16");

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

var pkgs = [
    {'reference':'kernel-default-4.4.121-92.199.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-default-base-4.4.121-92.199.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-default-devel-4.4.121-92.199.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-devel-4.4.121-92.199.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-macros-4.4.121-92.199.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-source-4.4.121-92.199.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']},
    {'reference':'kernel-syms-4.4.121-92.199.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-bcl-release-12.2']}
];

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-default / kernel-default-base / kernel-default-devel / etc');
}