SUSE SLES12 Security Update : kernel (Live Patch 38 for SLE 12 SP3) (SUSE-SU-2021:1870-1)

2021-06-07T00:00:00
ID SUSE_SU-2021-1870-1.NASL
Type nessus
Reporter This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-08-09T00:00:00

Description

The remote SUSE Linux SLES12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1870-1 advisory.

  • An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950. (CVE-2020-36322)

  • BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

                                        
                                            #%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2021:1870-1. The text itself
# is copyright (C) SUSE.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(150305);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/08/09");

  script_cve_id("CVE-2020-36322", "CVE-2021-28950", "CVE-2021-29154");
  script_xref(name:"SuSE", value:"SUSE-SU-2021:1870-1");

  script_name(english:"SUSE SLES12 Security Update : kernel (Live Patch 38 for SLE 12 SP3) (SUSE-SU-2021:1870-1)");

  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 a package installed that is affected by multiple vulnerabilities as referenced in
the SUSE-SU-2021:1870-1 advisory.

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka
    CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system
    crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as
    CVE-2021-28950. (CVE-2020-36322)

  - BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements,
    allowing them to execute arbitrary code within the kernel context. This affects
    arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1184710");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1184952");
  # https://lists.suse.com/pipermail/sle-security-updates/2021-June/008940.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2edfc089");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-36322");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-29154");
  script_set_attribute(attribute:"solution", value:
"Update the affected kgraft-patch-4_4_180-94_141-default package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-29154");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_180-94_141-default");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021 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('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string: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 sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3", os_ver + " SP" + sp);

var pkgs = [
    {'reference':'kgraft-patch-4_4_180-94_141-default-4-2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-12.3'},
    {'reference':'kgraft-patch-4_4_180-94_141-default-4-2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-12.3'},
    {'reference':'kgraft-patch-4_4_180-94_141-default-4-2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-12.3'}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach 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) {
      if (!rpm_exists(release:release, rpm:exists_check)) continue;
      if ('ltss' >< tolower(exists_check)) ltss_caveat_required = TRUE;
    }
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  var ltss_plugin_caveat = NULL;
  if(ltss_caveat_required) ltss_plugin_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in SUSE Enterprise Linux Server LTSS\n' +
    'repositories. Access to these package security updates require\n' +
    'a paid SUSE LTSS subscription.\n';
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + ltss_plugin_caveat
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kgraft-patch-4_4_180-94_141-default');
}