Vulnerabilities > CVE-2018-12020 - Use of Incorrectly-Resolved Name or Reference vulnerability in multiple products

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2018-640.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(110589);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2018-12020");
  script_xref(name:"IAVA", value:"2018-A-0193");

  script_name(english:"openSUSE Security Update : gpg2 (openSUSE-2018-640)");
  script_summary(english:"Check for the openSUSE-2018-640 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for gpg2 fixes the following security issue :

  - CVE-2018-12020: GnuPG mishandled the original filename
    during decryption and verification actions, which
    allowed remote attackers to spoof the output that GnuPG
    sends on file descriptor 2 to other programs that use
    the '--status-fd 2' option (bsc#1096745)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1096745"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected gpg2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gpg2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gpg2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gpg2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gpg2-lang");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/18");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 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/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.0|SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0 / 42.3", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.0", reference:"gpg2-2.2.5-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gpg2-debuginfo-2.2.5-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gpg2-debugsource-2.2.5-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gpg2-lang-2.2.5-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"gpg2-2.0.24-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"gpg2-debuginfo-2.0.24-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"gpg2-debugsource-2.0.24-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"gpg2-lang-2.0.24-9.3.1") ) 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, "gpg2 / gpg2-debuginfo / gpg2-debugsource / gpg2-lang");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:1696-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(110594);
  script_version("1.8");
  script_cvs_date("Date: 2019/09/10 13:51:48");

  script_cve_id("CVE-2018-12020");
  script_xref(name:"IAVA", value:"2018-A-0193");

  script_name(english:"SUSE SLES11 Security Update : gpg2 (SUSE-SU-2018:1696-1)");
  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 gpg2 fixes the following issues :

  - CVE-2018-12020: GnuPG mishandled the original filename
    during decryption and verification actions, which
    allowed remote attackers to spoof the output that GnuPG
    sends on file descriptor 2 to other programs that use
    the '--status-fd 2' option (bsc#1096745)

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=1096745"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-12020/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20181696-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?04ba298d"
  );
  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 Server 11-SP4:zypper in -t patch
slessp4-gpg2-13655=1

SUSE Linux Enterprise Server 11-SP3-LTSS:zypper in -t patch
slessp3-gpg2-13655=1

SUSE Linux Enterprise Point of Sale 11-SP3:zypper in -t patch
sleposp3-gpg2-13655=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
dbgsp4-gpg2-13655=1

SUSE Linux Enterprise Debuginfo 11-SP3:zypper in -t patch
dbgsp3-gpg2-13655=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gpg2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gpg2-lang");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "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 == "SLES11" && (! preg(pattern:"^(3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP3/4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"4", reference:"gpg2-2.0.9-25.33.42.3.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"gpg2-lang-2.0.9-25.33.42.3.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"gpg2-2.0.9-25.33.42.3.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"gpg2-lang-2.0.9-25.33.42.3.1")) 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, "gpg2");
}