SUSE SLES12 Security Update : kernel (SUSE-SU-2022:2721-1)

##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:2721-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(163994);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/14");

  script_cve_id(
    "CVE-2020-15393",
    "CVE-2020-36557",
    "CVE-2020-36558",
    "CVE-2021-33655",
    "CVE-2021-33656",
    "CVE-2021-39713",
    "CVE-2022-1462",
    "CVE-2022-2318",
    "CVE-2022-20166",
    "CVE-2022-26365",
    "CVE-2022-33740",
    "CVE-2022-33741",
    "CVE-2022-33742",
    "CVE-2022-36946"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2022:2721-1");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2022:2721-1)");

  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 SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in
the SUSE-SU-2022:2721-1 advisory.

  - In the Linux kernel 4.4 through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak,
    aka CID-28ebeb8db770. (CVE-2020-15393)

  - A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of
    ttys could lead to a use-after-free. (CVE-2020-36557)

  - A race condition in the Linux kernel before 5.5.7 involving VT_RESIZEX could lead to a NULL pointer
    dereference and general protection fault. (CVE-2020-36558)

  - When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of
    bounds. (CVE-2021-33655)

  - When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
    (CVE-2021-33656)

  - Product: AndroidVersions: Android kernelAndroid ID: A-173788806References: Upstream kernel
    (CVE-2021-39713)

  - An out-of-bounds read flaw was found in the Linux kernel's TeleTYpe subsystem. The issue occurs in how a
    user triggers a race condition using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage
    of memory in the flush_to_ldisc function. This flaw allows a local user to crash the system or read
    unauthorized random data from memory. (CVE-2022-1462)

  - In various methods of kernel base drivers, there is a possible out of bounds write due to a heap buffer
    overflow. This could lead to local escalation of privilege with System execution privileges needed. User
    interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
    A-182388481References: Upstream kernel (CVE-2022-20166)

  - There are use-after-free vulnerabilities caused by timer handler in net/rose/rose_timer.c of linux that
    allow attackers to crash linux kernel without any privileges. (CVE-2022-2318)

  - Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text
    explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device
    frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740).
    Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to
    unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend
    (CVE-2022-33741, CVE-2022-33742). (CVE-2022-26365, CVE-2022-33740, CVE-2022-33741, CVE-2022-33742)

  - nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote
    attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte
    nfta_payload attribute, an skb_pull can encounter a negative skb->len. (CVE-2022-36946)

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/1173514");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1196973");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198829");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200598");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200762");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1200910");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201251");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201429");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201635");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201636");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201742");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201752");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201930");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1201940");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-15393");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-36557");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-36558");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-33655");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-33656");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-39713");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-1462");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20166");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-2318");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-26365");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-33740");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-33741");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-33742");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-36946");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-August/011828.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?70eee337");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/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:N/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-2021-39713");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-33742");

  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:"2020/06/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-macros");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  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) 2022-2023 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:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES12', 'SUSE (' + os_ver + ')');

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 == "SLES12" && (! preg(pattern:"^(2)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'kernel-default-4.4.121-92.181.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-default-base-4.4.121-92.181.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-default-devel-4.4.121-92.181.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-devel-4.4.121-92.181.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-macros-4.4.121-92.181.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-source-4.4.121-92.181.1', 'sp':'2', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']},
    {'reference':'kernel-syms-4.4.121-92.181.1', 'sp':'2', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.2']}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( 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++;
  }
}

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-default / kernel-default-base / kernel-default-devel / etc');
}