Vulnerabilities > CVE-2018-10846 - Covert Timing Channel vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:2930-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(120112);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/16");

  script_cve_id("CVE-2017-10790", "CVE-2018-10844", "CVE-2018-10845", "CVE-2018-10846");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : gnutls (SUSE-SU-2018:2930-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for gnutls fixes the following security issues :

Improved mitigations against Lucky 13 class of attacks

CVE-2018-10846: 'Just in Time' PRIME + PROBE cache-based side channel
attack can lead to plaintext recovery (bsc#1105460)

CVE-2018-10845: HMAC-SHA-384 vulnerable to Lucky thirteen attack due
to use of wrong constant (bsc#1105459)

CVE-2018-10844: HMAC-SHA-256 vulnerable to Lucky thirteen attack due
to not enough dummy function calls (bsc#1105437)

CVE-2017-10790: The _asn1_check_identifier function in Libtasn1 caused
a NULL pointer dereference and crash (bsc#1047002)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1047002"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1105437"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1105459"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1105460"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-10790/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-10844/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-10845/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-10846/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20182930-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?8828fca1"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Desktop Applications 15:zypper in -t
patch SUSE-SLE-Module-Desktop-Applications-15-2018-2070=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
SUSE-SLE-Module-Basesystem-15-2018-2070=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-10845");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gnutls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gnutls-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gnutls-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutls-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutls30");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutls30-32bit-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutls30-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutlsxx-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutlsxx28");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgnutlsxx28-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/02");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  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("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
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:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP0", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"gnutls-debugsource-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"libgnutls30-32bit-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"libgnutls30-32bit-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gnutls-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gnutls-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gnutls-debugsource-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutls-devel-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutls30-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutls30-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutlsxx-devel-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutlsxx28-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgnutlsxx28-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"gnutls-debugsource-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"libgnutls30-32bit-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"libgnutls30-32bit-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gnutls-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gnutls-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gnutls-debugsource-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutls-devel-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutls30-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutls30-debuginfo-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutlsxx-devel-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutlsxx28-3.6.2-6.3.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgnutlsxx28-debuginfo-3.6.2-6.3.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gnutls");
}

#
# (C) Tenable Network Security, Inc.
#

# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2019-0068. The text
# itself is copyright (C) ZTE, Inc.

include("compat.inc");

if (description)
{
  script_id(127268);
  script_version("1.2");
  script_cvs_date("Date: 2019/10/17 14:31:04");

  script_cve_id("CVE-2018-10844", "CVE-2018-10845", "CVE-2018-10846");

  script_name(english:"NewStart CGSL CORE 5.04 / MAIN 5.04 : gnutls Multiple Vulnerabilities (NS-SA-2019-0068)");

  script_set_attribute(attribute:"synopsis", value:
"The remote machine is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has gnutls packages installed that are affected by
multiple vulnerabilities:

  - It was found that GnuTLS's implementation of HMAC-
    SHA-256 was vulnerable to Lucky Thirteen-style attack. A
    remote attacker could use this flaw to conduct
    distinguishing attacks and plain text recovery attacks
    via statistical analysis of timing data using crafted
    packets. (CVE-2018-10844)

  - It was found that GnuTLS's implementation of HMAC-
    SHA-384 was vulnerable to a Lucky Thirteen-style attack.
    A remote attacker could use this flaw to conduct
    distinguishing attacks and plain text recovery attacks
    via statistical analysis of timing data using crafted
    packets. (CVE-2018-10845)

  - A cache-based side channel attack was found in the way
    GnuTLS implements CBC-mode cipher suites. An attacker
    could use a combination of Just in Time Prime+probe
    and Lucky-13 attacks to recover plain text in a cross-VM
    attack scenario. (CVE-2018-10846)

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:"http://security.gd-linux.com/notice/NS-SA-2019-0068");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL gnutls packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-10845");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/ZTE-CGSL/release");
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, "NewStart Carrier Grade Server Linux");

if (release !~ "CGSL CORE 5.04" &&
    release !~ "CGSL MAIN 5.04")
  audit(AUDIT_OS_NOT, 'NewStart CGSL CORE 5.04 / NewStart CGSL MAIN 5.04');

if (!get_kb_item("Host/ZTE-CGSL/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "NewStart Carrier Grade Server Linux", cpu);

flag = 0;

pkgs = {
  "CGSL CORE 5.04": [
    "gnutls-3.3.29-9.el7_6",
    "gnutls-c++-3.3.29-9.el7_6",
    "gnutls-dane-3.3.29-9.el7_6",
    "gnutls-debuginfo-3.3.29-9.el7_6",
    "gnutls-devel-3.3.29-9.el7_6",
    "gnutls-utils-3.3.29-9.el7_6"
  ],
  "CGSL MAIN 5.04": [
    "gnutls-3.3.29-9.el7_6",
    "gnutls-c++-3.3.29-9.el7_6",
    "gnutls-dane-3.3.29-9.el7_6",
    "gnutls-debuginfo-3.3.29-9.el7_6",
    "gnutls-devel-3.3.29-9.el7_6",
    "gnutls-utils-3.3.29-9.el7_6"
  ]
};
pkg_list = pkgs[release];

foreach (pkg in pkg_list)
  if (rpm_check(release:"ZTE " + release, reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gnutls");
}