Vulnerabilities > CVE-2018-20340 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products

047910
CVSS 6.8 - MEDIUM
Attack vector
PHYSICAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
low complexity
yubico
debian
CWE-119
nessus
NVD
Published: 2019-03-21
Updated: 2024-11-21

Summary

Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.

Vulnerable Configurations

Part Description Count
Application
Yubico
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4389.NASL
    descriptionChristian Reitter discovered that libu2f-host, a library implementing the host-side of the U2F protocol, failed to properly check for a buffer overflow. This would allow an attacker with a custom made malicious USB device masquerading as a security key, and physical access to a computer where PAM U2F or an application with libu2f-host integrated, to potentially execute arbitrary code on that computer.
    last seen2020-06-01
    modified2020-06-02
    plugin id122102
    published2019-02-12
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/122102
    titleDebian DSA-4389-1 : libu2f-host - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4389. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(122102);
  script_version("1.3");
  script_cvs_date("Date: 2020/02/13");

  script_cve_id("CVE-2018-20340");
  script_xref(name:"DSA", value:"4389");

  script_name(english:"Debian DSA-4389-1 : libu2f-host - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Christian Reitter discovered that libu2f-host, a library implementing
the host-side of the U2F protocol, failed to properly check for a
buffer overflow. This would allow an attacker with a custom made
malicious USB device masquerading as a security key, and physical
access to a computer where PAM U2F or an application with libu2f-host
integrated, to potentially execute arbitrary code on that computer."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=921725"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/libu2f-host"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/libu2f-host"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2019/dsa-4389"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the libu2f-host packages.

For the stable distribution (stretch), this problem has been fixed in
version 1.1.2-2+deb9u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/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:"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:debian:debian_linux:libu2f-host");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/12");
  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:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"libu2f-host-dev", reference:"1.1.2-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libu2f-host0", reference:"1.1.2-2+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"u2f-host", reference:"1.1.2-2+deb9u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-1475.NASL
    descriptionThis update for libu2f-host fixes the following issues: 	 Security issue fixed : - CVE-2018-20340: Fixed an unchecked buffer, which could allow a buffer overflow with a custom made malicious USB device (bsc#1124781). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id125617
    published2019-05-31
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125617
    titleopenSUSE Security Update : libu2f-host (openSUSE-2019-1475)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-1475.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(125617);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/13");

  script_cve_id("CVE-2018-20340");

  script_name(english:"openSUSE Security Update : libu2f-host (openSUSE-2019-1475)");
  script_summary(english:"Check for the openSUSE-2019-1475 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 libu2f-host fixes the following issues: 	 Security
issue fixed :

  - CVE-2018-20340: Fixed an unchecked buffer, which could
    allow a buffer overflow with a custom made malicious USB
    device (bsc#1124781). 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=1124781"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libu2f-host packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/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:"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:opensuse:libu2f-host-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:u2f-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:u2f-host-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/31");
  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/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|SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0 / 15.1", 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 !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.0", reference:"libu2f-host-debuginfo-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libu2f-host-debugsource-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libu2f-host-devel-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libu2f-host0-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libu2f-host0-debuginfo-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"u2f-host-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"u2f-host-debuginfo-1.1.6-lp150.7.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libu2f-host-debuginfo-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libu2f-host-debugsource-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libu2f-host-devel-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libu2f-host0-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libu2f-host0-debuginfo-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"u2f-host-1.1.6-lp151.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"u2f-host-debuginfo-1.1.6-lp151.2.3.1") ) 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, "libu2f-host-debuginfo / libu2f-host-debugsource / libu2f-host-devel / etc");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202004-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202004-15 (libu2f-host: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in libu2f-host. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could entice a user to plug-in a malicious USB device, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-05-08
    modified2020-05-01
    plugin id136214
    published2020-05-01
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136214
    titleGLSA-202004-15 : libu2f-host: Multiple vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202004-15.
#
# The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(136214);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07");

  script_cve_id("CVE-2018-20340", "CVE-2019-9578");
  script_xref(name:"GLSA", value:"202004-15");

  script_name(english:"GLSA-202004-15 : libu2f-host: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-202004-15
(libu2f-host: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in libu2f-host. Please
      review the CVE identifiers referenced below for details.
  
Impact :

    A remote attacker could entice a user to plug-in a malicious USB device,
      possibly resulting in execution of arbitrary code with the privileges of
      the process or a Denial of Service condition.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/202004-15"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All libu2f-host users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=app-crypt/libu2f-host-1.1.10'"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/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-2018-20340");
  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:gentoo:linux:libu2f-host");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"app-crypt/libu2f-host", unaffected:make_list("ge 1.1.10"), vulnerable:make_list("lt 1.1.10"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libu2f-host");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-1749-1.NASL
    descriptionThis update for libu2f-host and pam_u2f to version 1.0.8 fixes the following issues : Security issues fixed for libu2f-host : CVE-2019-9578: Fixed a memory leak due to a wrong parse of init
    last seen2020-06-01
    modified2020-06-02
    plugin id126501
    published2019-07-05
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/126501
    titleSUSE SLED12 / SLES12 Security Update : libu2f-host (SUSE-SU-2019:1749-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:1749-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(126501);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/08");

  script_cve_id("CVE-2018-20340", "CVE-2019-12209", "CVE-2019-12210", "CVE-2019-9578");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : libu2f-host (SUSE-SU-2019:1749-1)");
  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 libu2f-host and pam_u2f to version 1.0.8 fixes the
following issues :

Security issues fixed for libu2f-host :

CVE-2019-9578: Fixed a memory leak due to a wrong parse of init's
response (bsc#1128140).

CVE-2018-20340: Fixed an unchecked buffer, which could allow a buffer
overflow with a custom made malicious USB device (bsc#1124781).

Security issues fixed for pam_u2f: CVE-2019-12209: Fixed an issue
where symlinks in the user's directory were followed (bsc#1135729).

CVE-2019-12210: Fixed file descriptor leaks (bsc#1135727).

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=1124781"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1128140"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1135727"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1135729"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-20340/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-12209/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-12210/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-9578/"
  );
  # https://www.suse.com/support/update/announcement/2019/suse-su-20191749-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?61def403"
  );
  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 12-SP4:zypper in -t patch
SUSE-SLE-SERVER-12-SP4-2019-1749=1

SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP4-2019-1749=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/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:L/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  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:libu2f-host-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:pam_u2f");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:pam_u2f-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:pam_u2f-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/05");
  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:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "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 == "SLES12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP4", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", reference:"libu2f-host-debugsource-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"libu2f-host0-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"libu2f-host0-debuginfo-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"pam_u2f-1.0.8-3.3.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"pam_u2f-debuginfo-1.0.8-3.3.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"pam_u2f-debugsource-1.0.8-3.3.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libu2f-host-debugsource-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libu2f-host0-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"libu2f-host0-debuginfo-1.1.6-3.5.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"pam_u2f-1.0.8-3.3.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"pam_u2f-debuginfo-1.0.8-3.3.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"pam_u2f-debugsource-1.0.8-3.3.1")) 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, "libu2f-host");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-1340-1.NASL
    descriptionThis update for libu2f-host fixes the following issues : Security issue fixed : CVE-2018-20340: Fixed an unchecked buffer, which could allow a buffer overflow with a custom made malicious USB device (bsc#1124781). 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.
    last seen2020-06-01
    modified2020-06-02
    plugin id125460
    published2019-05-28
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125460
    titleSUSE SLED15 / SLES15 Security Update : libu2f-host (SUSE-SU-2019:1340-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:1340-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(125460);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/15");

  script_cve_id("CVE-2018-20340");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : libu2f-host (SUSE-SU-2019:1340-1)");
  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 libu2f-host fixes the following issues :

Security issue fixed :

CVE-2018-20340: Fixed an unchecked buffer, which could allow a buffer
overflow with a custom made malicious USB device (bsc#1124781).

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=1124781"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-20340/"
  );
  # https://www.suse.com/support/update/announcement/2019/suse-su-20191340-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?095c8d3c"
  );
  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 Open Buildservice Development Tools
15:zypper in -t patch
SUSE-SLE-Module-Development-Tools-OBS-15-2019-1340=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
SUSE-SLE-Module-Basesystem-15-2019-1340=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/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:"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:libu2f-host-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libu2f-host0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:u2f-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:u2f-host-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/28");
  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", reference:"libu2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host-debugsource-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host-doc-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"u2f-host-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"u2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host-debugsource-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host-devel-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host0-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libu2f-host0-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-debugsource-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-doc-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"u2f-host-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"u2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-debuginfo-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-debugsource-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host-devel-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host0-1.1.6-3.3.3")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libu2f-host0-debuginfo-1.1.6-3.3.3")) 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, "libu2f-host");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-199.NASL
    descriptionThis update for libu2f-host fixes the following issues : Security issue fixed : - CVE-2018-20340: Fixed an unchecked buffer, which could allow a buffer overflow with a custom made malicious USB device (bsc#1124781).
    last seen2020-06-01
    modified2020-06-02
    plugin id122299
    published2019-02-19
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/122299
    titleopenSUSE Security Update : libu2f-host (openSUSE-2019-199)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-199.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(122299);
  script_version("1.3");
  script_cvs_date("Date: 2020/02/12");

  script_cve_id("CVE-2018-20340");

  script_name(english:"openSUSE Security Update : libu2f-host (openSUSE-2019-199)");
  script_summary(english:"Check for the openSUSE-2019-199 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 libu2f-host fixes the following issues :

Security issue fixed :

  - CVE-2018-20340: Fixed an unchecked buffer, which could
    allow a buffer overflow with a custom made malicious USB
    device (bsc#1124781)."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1124781"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libu2f-host packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/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:"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:opensuse:libu2f-host-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libu2f-host0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:u2f-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:u2f-host-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/19");
  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/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 !~ "^(SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "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 !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE42.3", reference:"libu2f-host-debugsource-1.0.0-5.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"libu2f-host-devel-1.0.0-5.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"libu2f-host0-1.0.0-5.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"libu2f-host0-debuginfo-1.0.0-5.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"u2f-host-1.0.0-5.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"u2f-host-debuginfo-1.0.0-5.3.1") ) 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, "libu2f-host-debugsource / libu2f-host-devel / libu2f-host0 / etc");
}

References