Ubuntu 18.04 ESM : Linux kernel (Azure) vulnerabilities (USN-6337-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6337-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(180488);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2020-36691",
    "CVE-2022-0168",
    "CVE-2022-1184",
    "CVE-2022-4269",
    "CVE-2022-27672",
    "CVE-2023-0590",
    "CVE-2023-1611",
    "CVE-2023-1855",
    "CVE-2023-1990",
    "CVE-2023-2124",
    "CVE-2023-2194",
    "CVE-2023-3111",
    "CVE-2023-3141",
    "CVE-2023-28466",
    "CVE-2023-30772",
    "CVE-2023-33203"
  );
  script_xref(name:"USN", value:"6337-1");

  script_name(english:"Ubuntu 18.04 ESM : Linux kernel (Azure) vulnerabilities (USN-6337-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-6337-1 advisory.

  - An issue was discovered in the Linux kernel before 5.8. lib/nlattr.c allows attackers to cause a denial of
    service (unbounded recursion) via a nested Netlink policy with a back reference. (CVE-2020-36691)

  - A denial of service (DOS) issue was found in the Linux kernel's smb2_ioctl_query_info function in the
    fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user
    function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.
    (CVE-2022-0168)

  - A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel's filesystem sub-
    component. This flaw allows a local attacker with a user privilege to cause a denial of service.
    (CVE-2022-1184)

  - When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the
    sibling thread after an SMT mode switch potentially resulting in information disclosure. (CVE-2022-27672)

  - A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking
    configuration (redirecting egress packets to ingress using TC action mirred) a local unprivileged user
    could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a
    retransmission, resulting in a denial of service condition. (CVE-2022-4269)

  - A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race
    problem. This flaw leads to a denial of service issue. If patch ebda44da44f6 (net: sched: fix race
    condition in qdisc_graft()) not applied yet, then kernel could be affected. (CVE-2023-0590)

  - A use-after-free flaw was found in btrfs_search_slot in fs/btrfs/ctree.c in btrfs in the Linux Kernel.This
    flaw allows an attacker to crash the system and possibly cause a kernel information lea (CVE-2023-1611)

  - A use-after-free flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware
    Monitoring Linux Kernel Driver (xgene-hwmon). This flaw could allow a local attacker to crash the system
    due to a race problem. This vulnerability could even lead to a kernel information leak problem.
    (CVE-2023-1855)

  - A use-after-free flaw was found in ndlc_remove in drivers/nfc/st-nci/ndlc.c in the Linux Kernel. This flaw
    could allow an attacker to crash the system due to a race problem. (CVE-2023-1990)

  - An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores
    an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or
    potentially escalate their privileges on the system. (CVE-2023-2124)

  - An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The
    userspace data->block[0] variable was not capped to a number between 0-255 and was used as the size of a
    memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to
    crash the system or potentially achieve code execution. (CVE-2023-2194)

  - do_tls_getsockopt in net/tls/tls_main.c in the Linux kernel through 6.2.6 lacks a lock_sock call, leading
    to a race condition (with a resultant use-after-free or NULL pointer dereference). (CVE-2023-28466)

  - The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in
    drivers/power/supply/da9150-charger.c if a physically proximate attacker unplugs a device.
    (CVE-2023-30772)

  - A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the
    Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling
    btrfs_ioctl_defrag(). (CVE-2023-3111)

  - A use-after-free flaw was found in r592_remove in drivers/memstick/host/r592.c in media access in the
    Linux Kernel. This flaw allows a local attacker to crash the system at device disconnect, possibly leading
    to a kernel information leak. (CVE-2023-3141)

  - The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in
    drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device.
    (CVE-2023-33203)

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://ubuntu.com/security/notices/USN-6337-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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-2023-3111");

  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:"2022/06/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/09/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1113-azure");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

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

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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, 'Ubuntu', cpu);

var kernel_mappings = {
  '18.04': {
    '5.4.0': {
      'azure': '5.4.0-1113'
    }
  }
};

var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);

var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
  extra = extra + 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
  else
{
  audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-6337-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2020-36691', 'CVE-2022-0168', 'CVE-2022-1184', 'CVE-2022-4269', 'CVE-2022-27672', 'CVE-2023-0590', 'CVE-2023-1611', 'CVE-2023-1855', 'CVE-2023-1990', 'CVE-2023-2124', 'CVE-2023-2194', 'CVE-2023-3111', 'CVE-2023-3141', 'CVE-2023-28466', 'CVE-2023-30772', 'CVE-2023-33203');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6337-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}