SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0955-2)

##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2021:0955-2. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(163092);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/13");

  script_cve_id("CVE-2021-3449");
  script_xref(name:"SuSE", value:"SUSE-SU-2021:0955-2");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0955-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-
SU-2021:0955-2 advisory.

  - An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a
    client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was
    present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL
    pointer dereference will result, leading to a crash and a denial of service attack. A server is only
    vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS
    clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of
    these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in
    OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). (CVE-2021-3449)

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/1183852");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3449");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-July/011541.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2a2b4b02");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3449");

  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:"2021/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl-1_1-devel-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libopenssl1_1-hmac-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssl-1_1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssl-1_1-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  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:"^(SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES15', '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 == "SLES15" && (! preg(pattern:"^(3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP3", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'libopenssl-1_1-devel-1.1.1d-11.20.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'libopenssl-1_1-devel-32bit-1.1.1d-11.20.1', 'sp':'3', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'libopenssl1_1-1.1.1d-11.20.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'libopenssl1_1-32bit-1.1.1d-11.20.1', 'sp':'3', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'libopenssl1_1-hmac-1.1.1d-11.20.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'libopenssl1_1-hmac-32bit-1.1.1d-11.20.1', 'sp':'3', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'openssl-1_1-1.1.1d-11.20.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']},
    {'reference':'openssl-1_1-doc-1.1.1d-11.20.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-certifications-release-15.3']}
];

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, 'libopenssl-1_1-devel / libopenssl-1_1-devel-32bit / libopenssl1_1 / etc');
}