Vulnerabilities > CVE-2018-10903 - Improper Input Validation 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-2018-1281.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(118451);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2018-10903");

  script_name(english:"openSUSE Security Update : python-cryptography (openSUSE-2018-1281)");
  script_summary(english:"Check for the openSUSE-2018-1281 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 python-cryptography fixes the following issues :

  - CVE-2018-10903: The finalize_with_tag API did not
    enforce a minimum tag length. If a user did not validate
    the input length prior to passing it to
    finalize_with_tag an attacker could craft an invalid
    payload with a shortened tag (e.g. 1 byte) such that
    they would have a 1 in 256 chance of passing the MAC
    check. GCM tag forgeries could have caused key leakage
    (bsc#1101820).

This update was imported from the SUSE:SLE-15:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1101820"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected python-cryptography packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-cryptography-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-cryptography-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python2-cryptography");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python2-cryptography-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-cryptography");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-cryptography-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/26");
  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)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", 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:"python-cryptography-debuginfo-2.1.4-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"python-cryptography-debugsource-2.1.4-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"python2-cryptography-2.1.4-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"python2-cryptography-debuginfo-2.1.4-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"python3-cryptography-2.1.4-lp150.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"python3-cryptography-debuginfo-2.1.4-lp150.3.3.1") ) 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, "python-cryptography-debuginfo / python-cryptography-debugsource / etc");
}