SUSE SLES15 Security Update : kernel (Live Patch 2 for SLE 15 SP5) (SUSE-SU-2024:1023-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2024:1023-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(192663);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/28");

  script_cve_id(
    "CVE-2023-6531",
    "CVE-2023-39191",
    "CVE-2023-46813",
    "CVE-2023-51779"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2024:1023-1");

  script_name(english:"SUSE SLES15 Security Update : kernel (Live Patch 2 for SLE 15 SP5) (SUSE-SU-2024:1023-1)");

  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 host has a package installed that is affected by multiple vulnerabilities as referenced in
the SUSE-SU-2024:1023-1 advisory.

  - An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs
    due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to
    executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute
    arbitrary code in the context of the kernel. (CVE-2023-39191)

  - An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access
    to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES
    emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege
    escalation). This depends on a race condition through which userspace can replace an instruction before
    the #VC handler reads it. (CVE-2023-46813)

  - bt_sock_recvmsg in net/bluetooth/af_bluetooth.c in the Linux kernel through 6.6.8 has a use-after-free
    because of a bt_sock_ioctl race condition. (CVE-2023-51779)

  - A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector's
    deletion of SKB races with unix_stream_read_generic() on the socket that the SKB is queued on.
    (CVE-2023-6531)

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/1215887");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1216898");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1218487");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1218610");
  # https://lists.suse.com/pipermail/sle-security-updates/2024-March/018229.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aa3226d1");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-39191");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-46813");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-51779");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-6531");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel-livepatch-5_14_21-150500_55_12-default package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/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:H/UI:N/S:C/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-2023-39191");

  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:"2023/10/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-livepatch-5_14_21-150500_55_12-default");
  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) 2024 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:"^(SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES15', 'SUSE (' + os_ver + ')');

var uname_r = get_kb_item("Host/uname-r");
if (empty_or_null(uname_r)) audit(AUDIT_UNKNOWN_APP_VER, "kernel");

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:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP5", os_ver + " SP" + service_pack);

var kernel_live_checks = [
  {
    'kernels': {
      '5.14.21-150500.55.12-default': {
        'pkgs': [
          {'reference':'kernel-livepatch-5_14_21-150500_55_12-default-8-150500.2.3', 'sp':'5', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-live-patching-release-15.5']}
        ]
      }
    }
  }
];

var ltss_caveat_required = FALSE;
var flag = 0;
var kernel_affected = FALSE;
foreach var kernel_array ( kernel_live_checks ) {
  var kpatch_details = kernel_array['kernels'][uname_r];
  if (empty_or_null(kpatch_details)) continue;
  kernel_affected = TRUE;
  foreach var package_array ( kpatch_details['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++;
  }
}

# No kpatch details found for the running kernel version
if (!kernel_affected) audit(AUDIT_INST_VER_NOT_VULN, 'kernel', uname_r);

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-livepatch-5_14_21-150500_55_12-default');
}