It was discovered that libxkbcommon incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service. (CVE-2018-15853, CVE-2018-15854, CVE-2018-15855, CVE-2018-15856, CVE-2018-15857, CVE-2018-15858, CVE-2018-15859, CVE-2018-15861, CVE-2018-15862, CVE-2018-15863, CVE-2018-15864).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3786-1. The text
# itself is copyright (C) Canonical, Inc. See
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
#
include('compat.inc');
if (description)
{
script_id(117996);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");
script_cve_id(
"CVE-2018-15853",
"CVE-2018-15854",
"CVE-2018-15855",
"CVE-2018-15856",
"CVE-2018-15857",
"CVE-2018-15858",
"CVE-2018-15859",
"CVE-2018-15861",
"CVE-2018-15862",
"CVE-2018-15863",
"CVE-2018-15864"
);
script_xref(name:"USN", value:"3786-1");
script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : libxkbcommon vulnerabilities (USN-3786-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"It was discovered that libxkbcommon incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of
service. (CVE-2018-15853, CVE-2018-15854, CVE-2018-15855,
CVE-2018-15856, CVE-2018-15857, CVE-2018-15858, CVE-2018-15859,
CVE-2018-15861, CVE-2018-15862, CVE-2018-15863, CVE-2018-15864).
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-3786-1");
script_set_attribute(attribute:"solution", value:
"Update the affected 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:L/AC:L/PR:L/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-2018-15857");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/25");
script_set_attribute(attribute:"patch_publication_date", value:"2018/10/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-x11-0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-x11-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxkbcommon0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-dev");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2018-2023 Canonical, Inc. / NASL script (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('debian_package.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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, 'Ubuntu', cpu);
var pkgs = [
{'osver': '14.04', 'pkgname': 'libxkbcommon-dev', 'pkgver': '0.4.1-0ubuntu1.1'},
{'osver': '14.04', 'pkgname': 'libxkbcommon-x11-0', 'pkgver': '0.4.1-0ubuntu1.1'},
{'osver': '14.04', 'pkgname': 'libxkbcommon-x11-dev', 'pkgver': '0.4.1-0ubuntu1.1'},
{'osver': '14.04', 'pkgname': 'libxkbcommon0', 'pkgver': '0.4.1-0ubuntu1.1'},
{'osver': '16.04', 'pkgname': 'libxkbcommon-dev', 'pkgver': '0.5.0-1ubuntu2.1'},
{'osver': '16.04', 'pkgname': 'libxkbcommon-x11-0', 'pkgver': '0.5.0-1ubuntu2.1'},
{'osver': '16.04', 'pkgname': 'libxkbcommon-x11-dev', 'pkgver': '0.5.0-1ubuntu2.1'},
{'osver': '16.04', 'pkgname': 'libxkbcommon0', 'pkgver': '0.5.0-1ubuntu2.1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var osver = NULL;
var pkgname = NULL;
var pkgver = NULL;
if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
if (osver && pkgname && pkgver) {
if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libxkbcommon-dev / libxkbcommon-x11-0 / libxkbcommon-x11-dev / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | libxkbcommon-x11-0 | p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-x11-0 |
canonical | ubuntu_linux | libxkbcommon-x11-dev | p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-x11-dev |
canonical | ubuntu_linux | libxkbcommon0 | p-cpe:/a:canonical:ubuntu_linux:libxkbcommon0 |
canonical | ubuntu_linux | 14.04 | cpe:/o:canonical:ubuntu_linux:14.04:-:lts |
canonical | ubuntu_linux | 16.04 | cpe:/o:canonical:ubuntu_linux:16.04:-:lts |
canonical | ubuntu_linux | libxkbcommon-dev | p-cpe:/a:canonical:ubuntu_linux:libxkbcommon-dev |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15853
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15854
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15855
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15856
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15857
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15858
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15859
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15861
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15863
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15864
ubuntu.com/security/notices/USN-3786-1