Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-6132-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6132-1. 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(176563);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id(
    "CVE-2022-3707",
    "CVE-2023-0459",
    "CVE-2023-1075",
    "CVE-2023-1078",
    "CVE-2023-1118",
    "CVE-2023-1380",
    "CVE-2023-1513",
    "CVE-2023-2162",
    "CVE-2023-2612",
    "CVE-2023-30456",
    "CVE-2023-31436",
    "CVE-2023-32233",
    "CVE-2023-32269"
  );
  script_xref(name:"USN", value:"6132-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-6132-1)");

  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 / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-6132-1 advisory.

  - A double-free memory flaw was found in the Linux kernel. The Intel GVT-g graphics driver triggers VGA card
    system resource overload, causing a fail in the intel_gvt_dma_map_guest_page function. This issue could
    allow a local user to crash the system. (CVE-2022-3707)

  - Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec
    allowing a user to bypass the access_ok check and pass a kernel pointer to copy_from_user(). This would
    allow an attacker to leak information. We recommend upgrading beyond commit
    74e19ef0ff8061ef55957c3abd71614ef0f42f47 (CVE-2023-0459)

  - A flaw was found in the Linux Kernel. The tls_is_tx_ready() incorrectly checks for list emptiness,
    potentially accessing a type confused entry to the list_head, leaking the last byte of the confused field
    that overlaps with rec->tx_ready. (CVE-2023-1075)

  - A flaw was found in the Linux Kernel in RDS (Reliable Datagram Sockets) protocol. The
    rds_rm_zerocopy_callback() uses list_entry() on the head of a list causing a type confusion. Local user
    can trigger this with rds_message_put(). Type confusion leads to `struct rds_msg_zcopy_info *info`
    actually points to something else that is potentially controlled by local user. It is known how to trigger
    this, which causes an out of bounds access, and a lock corruption. (CVE-2023-1078)

  - A flaw use after free in the Linux kernel integrated infrared receiver/transceiver driver was found in the
    way user detaching rc device. A local user could use this flaw to crash the system or potentially escalate
    their privileges on the system. (CVE-2023-1118)

  - A slab-out-of-bound read problem was found in brcmf_get_assoc_ies in
    drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux Kernel. This issue could occur
    when assoc_info->req_len data is bigger than the size of the buffer, defined as WL_EXTRA_BUF_MAX, leading
    to a denial of service. (CVE-2023-1380)

  - A flaw was found in KVM. When calling the KVM_GET_DEBUGREGS ioctl, on 32-bit systems, there might be some
    uninitialized portions of the kvm_debugregs structure that could be copied to userspace, causing an
    information leak. (CVE-2023-1513)

  - A use-after-free vulnerability was found in iscsi_sw_tcp_session_create in drivers/scsi/iscsi_tcp.c in
    SCSI sub-component in the Linux Kernel. In this flaw an attacker could leak kernel internal information.
    (CVE-2023-2162)

  - Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race
    condition when handling inode locking in some situations. A local attacker could use this to cause a
    denial of service (kernel deadlock). (CVE-2023-2612)

  - An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64
    lacks consistency checks for CR0 and CR4. (CVE-2023-30456)

  - qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write
    because lmax can exceed QFQ_MIN_LMAX. (CVE-2023-31436)

  - In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests
    can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users
    can obtain root privileges. This occurs because anonymous sets are mishandled. (CVE-2023-32233)

  - An issue was discovered in the Linux kernel before 6.1.11. In net/netrom/af_netrom.c, there is a use-
    after-free because accept is also allowed for a successfully connected AF_NETROM socket. However, in order
    for an attacker to exploit this, the system must have netrom routing configured or the attacker must have
    the CAP_NET_ADMIN capability. (CVE-2023-32269)

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-6132-1");
  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-2023-32233");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/01/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/06/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/01");

  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:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1064-bluefield");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1103-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) 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 || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', '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': {
      'aws': '5.4.0-1103'
    }
  },
  '20.04': {
    '5.4.0': {
      'bluefield': '5.4.0-1064'
    }
  }
};

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-6132-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2022-3707', 'CVE-2023-0459', 'CVE-2023-1075', 'CVE-2023-1078', 'CVE-2023-1118', 'CVE-2023-1380', 'CVE-2023-1513', 'CVE-2023-2162', 'CVE-2023-2612', 'CVE-2023-30456', 'CVE-2023-31436', 'CVE-2023-32233', 'CVE-2023-32269');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6132-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}