The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2869 advisory.
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcRenderCompositeGlyphs function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-4008)
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-4009)
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-4011)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2869. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(156392);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/26");
script_cve_id("CVE-2021-4008", "CVE-2021-4009", "CVE-2021-4011");
script_name(english:"Debian DLA-2869-1 : xorg-server - LTS security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-2869 advisory.
- A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access
can occur in the SProcRenderCompositeGlyphs function. The highest threat from this vulnerability is to
data confidentiality and integrity as well as system availability. (CVE-2021-4008)
- A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access
can occur in the SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is
to data confidentiality and integrity as well as system availability. (CVE-2021-4009)
- A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access
can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data
confidentiality and integrity as well as system availability. (CVE-2021-4011)
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:"https://security-tracker.debian.org/tracker/source-package/xorg-server");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2021/dla-2869");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-4008");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-4009");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-4011");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/xorg-server");
script_set_attribute(attribute:"solution", value:
"Upgrade the xorg-server packages.
For Debian 9 stretch, these problems have been fixed in version 2");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
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-2021-4011");
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:"2021/12/17");
script_set_attribute(attribute:"patch_publication_date", value:"2021/12/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/30");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdmx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdmx-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xnest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xorg-server-source");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xephyr");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xserver-xorg-legacy");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xvfb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xwayland");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
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/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);
var pkgs = [
{'release': '9.0', 'prefix': 'xdmx', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xdmx-tools', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xnest', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xorg-server-source', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xserver-common', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xserver-xephyr', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xserver-xorg-core', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xserver-xorg-dev', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xserver-xorg-legacy', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xvfb', 'reference': '2:1.19.2-1+deb9u9'},
{'release': '9.0', 'prefix': 'xwayland', 'reference': '2:1.19.2-1+deb9u9'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'xdmx / xdmx-tools / xnest / xorg-server-source / xserver-common / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | xdmx | p-cpe:/a:debian:debian_linux:xdmx |
debian | debian_linux | xdmx-tools | p-cpe:/a:debian:debian_linux:xdmx-tools |
debian | debian_linux | xnest | p-cpe:/a:debian:debian_linux:xnest |
debian | debian_linux | xorg-server-source | p-cpe:/a:debian:debian_linux:xorg-server-source |
debian | debian_linux | xserver-common | p-cpe:/a:debian:debian_linux:xserver-common |
debian | debian_linux | xserver-xephyr | p-cpe:/a:debian:debian_linux:xserver-xephyr |
debian | debian_linux | xserver-xorg-core | p-cpe:/a:debian:debian_linux:xserver-xorg-core |
debian | debian_linux | xserver-xorg-dev | p-cpe:/a:debian:debian_linux:xserver-xorg-dev |
debian | debian_linux | xserver-xorg-legacy | p-cpe:/a:debian:debian_linux:xserver-xorg-legacy |
debian | debian_linux | xvfb | p-cpe:/a:debian:debian_linux:xvfb |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4008
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4009
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4011
packages.debian.org/source/stretch/xorg-server
security-tracker.debian.org/tracker/CVE-2021-4008
security-tracker.debian.org/tracker/CVE-2021-4009
security-tracker.debian.org/tracker/CVE-2021-4011
security-tracker.debian.org/tracker/source-package/xorg-server
www.debian.org/lts/security/2021/dla-2869