Ubuntu 18.04 LTS : Linux kernel (GCP) vulnerabilities (USN-5939-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5939-1. 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(172362);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2022-3169",
    "CVE-2022-3424",
    "CVE-2022-3435",
    "CVE-2022-3521",
    "CVE-2022-3545",
    "CVE-2022-3623",
    "CVE-2022-4139",
    "CVE-2022-36280",
    "CVE-2022-41218",
    "CVE-2022-42328",
    "CVE-2022-42329",
    "CVE-2022-47520",
    "CVE-2022-47929",
    "CVE-2023-0045",
    "CVE-2023-0266",
    "CVE-2023-0394",
    "CVE-2023-0461",
    "CVE-2023-20938",
    "CVE-2023-23454",
    "CVE-2023-23455"
  );
  script_xref(name:"USN", value:"5939-1");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/04/20");

  script_name(english:"Ubuntu 18.04 LTS : Linux kernel (GCP) vulnerabilities (USN-5939-1)");

  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 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-5939-1 advisory.

  - A flaw was found in the Linux kernel. A denial of service flaw may occur if there is a consecutive request
    of the NVME_IOCTL_RESET and the NVME_IOCTL_SUBSYS_RESET through the device file of the driver, resulting
    in a PCIe link disconnect. (CVE-2022-3169)

  - A use-after-free flaw was found in the Linux kernel's SGI GRU driver in the way the first
    gru_file_unlocked_ioctl function is called by the user, where a fail pass occurs in the
    gru_check_chiplet_assignment function. This flaw allows a local user to crash or potentially escalate
    their privileges on the system. (CVE-2022-3424)

  - A vulnerability classified as problematic has been found in Linux Kernel. This affects the function
    fib_nh_match of the file net/ipv4/fib_semantics.c of the component IPv4 Handler. The manipulation leads to
    out-of-bounds read. It is possible to initiate the attack remotely. It is recommended to apply a patch to
    fix this issue. The identifier VDB-210357 was assigned to this vulnerability. (CVE-2022-3435)

  - A vulnerability has been found in Linux Kernel and classified as problematic. This vulnerability affects
    the function kcm_tx_work of the file net/kcm/kcmsock.c of the component kcm. The manipulation leads to
    race condition. It is recommended to apply a patch to fix this issue. VDB-211018 is the identifier
    assigned to this vulnerability. (CVE-2022-3521)

  - A vulnerability has been found in Linux Kernel and classified as critical. Affected by this vulnerability
    is the function area_cache_get of the file drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c of the
    component IPsec. The manipulation leads to use after free. It is recommended to apply a patch to fix this
    issue. The identifier VDB-211045 was assigned to this vulnerability. (CVE-2022-3545)

  - A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this
    vulnerability is the function follow_page_pte of the file mm/gup.c of the component BPF. The manipulation
    leads to race condition. The attack can be launched remotely. It is recommended to apply a patch to fix
    this issue. The identifier VDB-211921 was assigned to this vulnerability. (CVE-2022-3623)

  - An out-of-bounds(OOB) memory access vulnerability was found in vmwgfx driver in
    drivers/gpu/vmxgfx/vmxgfx_kms.c in GPU component in the Linux kernel with device file '/dev/dri/renderD128
    (or Dxxx)'. This flaw allows a local attacker with a user account on the system to gain privilege, causing
    a denial of service(DoS). (CVE-2022-36280)

  - In drivers/media/dvb-core/dmxdev.c in the Linux kernel through 5.19.10, there is a use-after-free caused
    by refcount races, affecting dvb_demux_open and dvb_dmxdev_release. (CVE-2022-41218)

  - An incorrect TLB flush issue was found in the Linux kernel's GPU i915 kernel driver, potentially leading
    to random memory corruption or data leaks. This flaw could allow a local user to crash the system or
    escalate their privileges on the system. (CVE-2022-4139)

  - Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs;
    the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced
    another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the
    XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock
    could occur in case of netpoll being active for the interface the xen-netback driver is connected to
    (CVE-2022-42329). (CVE-2022-42328, CVE-2022-42329)

  - An issue was discovered in the Linux kernel before 6.0.11. Missing offset validation in
    drivers/net/wireless/microchip/wilc1000/hif.c in the WILC1000 wireless driver can trigger an out-of-bounds
    read when parsing a Robust Security Network (RSN) information element from a Netlink packet.
    (CVE-2022-47520)

  - 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)

  - The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The
    ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL
    MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the
    TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to
    the prctl syscall. The patch that added the support for the conditional mitigation via prctl
    (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit
    a664ec9158eeddd75121d39c9a0758016097fa96 (CVE-2023-0045)

  - A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel.
    SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result
    in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit
    56b88b50565cd8b946a2d00b0c83927b7ebb055e (CVE-2023-0266)

  - A NULL pointer dereference flaw was found in rawv6_push_pending_frames in net/ipv6/raw.c in the network
    subcomponent in the Linux kernel. This flaw causes the system to crash. (CVE-2023-0394)

  - There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local
    privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or
    CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege. There is a
    use-after-free bug of icsk_ulp_data of a struct inet_connection_sock. When CONFIG_TLS is enabled, user can
    install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this
    socket is disconnected and reused as a listener. If a new socket is created from the listener, the context
    is inherited and vulnerable. The setsockopt TCP_ULP operation does not require any privilege. We recommend
    upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c (CVE-2023-0461)

  - In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input
    validation. This could lead to local escalation of privilege with no additional execution privileges
    needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid
    ID: A-257685302References: Upstream kernel (CVE-2023-20938)

  - 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://ubuntu.com/security/notices/USN-5939-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  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-2023-0045");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-20938");

  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:"2022/09/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/03/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/03/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1101-gcp");
  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': {
      'gcp': '5.4.0-1101'
    }
  }
};

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-5939-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2022-3169', 'CVE-2022-3424', 'CVE-2022-3435', 'CVE-2022-3521', 'CVE-2022-3545', 'CVE-2022-3623', 'CVE-2022-4139', 'CVE-2022-36280', 'CVE-2022-41218', 'CVE-2022-42328', 'CVE-2022-42329', 'CVE-2022-47520', 'CVE-2022-47929', 'CVE-2023-0045', 'CVE-2023-0266', 'CVE-2023-0394', 'CVE-2023-0461', 'CVE-2023-20938', 'CVE-2023-23454', 'CVE-2023-23455');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5939-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}