Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (AWS) vulnerabilities (USN-6705-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6705-1. 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(192311);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/30");

  script_cve_id(
    "CVE-2023-4134",
    "CVE-2023-6121",
    "CVE-2023-22995",
    "CVE-2023-23000",
    "CVE-2023-32247",
    "CVE-2023-46343",
    "CVE-2023-46862",
    "CVE-2023-51779",
    "CVE-2023-51782",
    "CVE-2024-0340",
    "CVE-2024-0607",
    "CVE-2024-1085",
    "CVE-2024-1086",
    "CVE-2024-24855"
  );
  script_xref(name:"USN", value:"6705-1");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2024/06/20");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (AWS) vulnerabilities (USN-6705-1)");

  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 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-6705-1 advisory.

  - In the Linux kernel before 5.17, an error path in dwc3_qcom_acpi_register_core in
    drivers/usb/dwc3/dwc3-qcom.c lacks certain platform_device_put and kfree calls. (CVE-2023-22995)

  - In the Linux kernel before 5.17, drivers/phy/tegra/xusb.c mishandles the tegra_xusb_find_port_node return
    value. Callers expect NULL in the error case, but an error pointer is used. (CVE-2023-23000)

  - A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw
    exists within the handling of SMB2_SESSION_SETUP commands. The issue results from the lack of control of
    resource consumption. An attacker can leverage this vulnerability to create a denial-of-service condition
    on the system. (CVE-2023-32247)

  - In the Linux kernel before 6.5.9, there is a NULL pointer dereference in send_acknowledge in
    net/nfc/nci/spi.c. (CVE-2023-46343)

  - An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an
    io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur. (CVE-2023-46862)

  - 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)

  - An issue was discovered in the Linux kernel before 6.6.8. rose_ioctl in net/rose/af_rose.c has a use-
    after-free because of a rose_accept race condition. (CVE-2023-51782)

  - An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue
    may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that
    results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg).
    (CVE-2023-6121)

  - A vulnerability was found in vhost_new_msg in drivers/vhost/vhost.c in the Linux kernel, which does not
    properly initialize memory in messages passed between virtual guests and the host operating system in the
    vhost/vhost.c:vhost_new_msg() function. This issue can allow local privileged users to read some kernel
    memory contents when reading from the /dev/vhost-net device file. (CVE-2024-0340)

  - A flaw was found in the Netfilter subsystem in the Linux kernel. The issue is in the nft_byteorder_eval()
    function, where the code iterates through a loop and writes to the `dst` array. On each iteration, 8 bytes
    are written, but `dst` is an array of u32, so each element only has space for 4 bytes. That means every
    iteration overwrites part of the previous element corrupting this array of u32. This flaw allows a local
    user to cause a denial of service or potentially break NetFilter functionality. (CVE-2024-0607)

  - A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to
    achieve local privilege escalation. The nft_setelem_catchall_deactivate() function checks whether the
    catch-all set element is active in the current generation instead of the next generation before freeing
    it, but only flags it inactive in the next generation, making it possible to free the element multiple
    times, leading to a double free vulnerability. We recommend upgrading past commit
    b1db244ffd041a49ecc9618e8feb6b5c1afcdaa7. (CVE-2024-1085)

  - A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to
    achieve local privilege escalation. The nft_verdict_init() function allows positive values as drop error
    within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when
    NF_DROP is issued with a drop error which resembles NF_ACCEPT. We recommend upgrading past commit
    f342de4e2f33e0e39165d8639387aa6c19dff660. (CVE-2024-1086)

  - A race condition was found in the Linux kernel's scsi device driver in lpfc_unregister_fcf_rescan()
    function. This can result in a null pointer dereference issue, possibly leading to a kernel panic or
    denial of service issue. (CVE-2024-24855)

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-6705-1");
  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: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-2024-1086");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/02/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1056-aws");
  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) 2024 Canonical, Inc. / NASL script (C) 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 (! ('20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04', '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 = {
  '20.04': {
    '5.15.0': {
      'aws': '5.15.0-1056'
    }
  },
  '22.04': {
    '5.15.0': {
      'aws': '5.15.0-1056'
    }
  }
};

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-6705-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2023-4134', 'CVE-2023-6121', 'CVE-2023-22995', 'CVE-2023-23000', 'CVE-2023-32247', 'CVE-2023-46343', 'CVE-2023-46862', 'CVE-2023-51779', 'CVE-2023-51782', 'CVE-2024-0340', 'CVE-2024-0607', 'CVE-2024-1085', 'CVE-2024-1086', 'CVE-2024-24855');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6705-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}