8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.028 Low
EPSS
Percentile
90.7%
The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5778-1 advisory.
A vulnerability was found in X.Org. This security flaw occurs because the handler for the XIChangeProperty request has a length-validation issues, resulting in out-of-bounds memory reads and potential information disclosure. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. (CVE-2022-46344)
A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests… This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. (CVE-2022-4283)
A vulnerability was found in X.Org. This security flaw occurs becuase the swap handler for the XTestFakeInput request of the XTest extension may corrupt the stack if GenericEvents with lengths larger than 32 bytes are sent through a the XTestFakeInput request. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. This issue does not affect systems where client and server use the same byte order.
(CVE-2022-46340)
A vulnerability was found in X.Org. This security flaw occurs because the handler for the XIPassiveUngrab request accesses out-of-bounds memory when invoked with a high keycode or button code. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. (CVE-2022-46341)
A vulnerability was found in X.Org. This security flaw occurs because the handler for the XvdiSelectVideoNotify request may write to memory after it has been freed. This issue can lead to local privileges elevation on systems where the X se (CVE-2022-46342)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5778-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(168724);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");
script_cve_id(
"CVE-2022-4283",
"CVE-2022-46340",
"CVE-2022-46341",
"CVE-2022-46342",
"CVE-2022-46343",
"CVE-2022-46344"
);
script_xref(name:"USN", value:"5778-1");
script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : X.Org X Server vulnerabilities (USN-5778-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-5778-1 advisory.
- A vulnerability was found in X.Org. This security flaw occurs because the handler for the XIChangeProperty
request has a length-validation issues, resulting in out-of-bounds memory reads and potential information
disclosure. This issue can lead to local privileges elevation on systems where the X server is running
privileged and remote code execution for ssh X forwarding sessions. (CVE-2022-46344)
- A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a
dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName
requests.. This issue can lead to local privileges elevation on systems where the X server is running
privileged and remote code execution for ssh X forwarding sessions. (CVE-2022-4283)
- A vulnerability was found in X.Org. This security flaw occurs becuase the swap handler for the
XTestFakeInput request of the XTest extension may corrupt the stack if GenericEvents with lengths larger
than 32 bytes are sent through a the XTestFakeInput request. This issue can lead to local privileges
elevation on systems where the X server is running privileged and remote code execution for ssh X
forwarding sessions. This issue does not affect systems where client and server use the same byte order.
(CVE-2022-46340)
- A vulnerability was found in X.Org. This security flaw occurs because the handler for the XIPassiveUngrab
request accesses out-of-bounds memory when invoked with a high keycode or button code. This issue can lead
to local privileges elevation on systems where the X server is running privileged and remote code
execution for ssh X forwarding sessions. (CVE-2022-46341)
- A vulnerability was found in X.Org. This security flaw occurs because the handler for the
XvdiSelectVideoNotify request may write to memory after it has been freed. This issue can lead to local
privileges elevation on systems where the X se (CVE-2022-46342)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-5778-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:N/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-2022-46344");
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:"2022/12/14");
script_set_attribute(attribute:"patch_publication_date", value:"2022/12/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/12/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xdmx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xdmx-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xmir");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xnest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xorg-server-source");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xorg-server-source-hwe-18.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xephyr");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xephyr-hwe-18.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-hwe-18.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-dev-hwe-18.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-legacy");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-legacy-hwe-18.04");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-xmir");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xvfb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xwayland");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xwayland-hwe-18.04");
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) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 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 (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04', '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': '18.04', 'pkgname': 'xdmx', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xdmx-tools', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xmir', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xnest', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xorg-server-source', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xorg-server-source-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '18.04', 'pkgname': 'xserver-common', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xserver-xephyr', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xserver-xephyr-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-core', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-core-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-dev', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-dev-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-legacy', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-legacy-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '18.04', 'pkgname': 'xserver-xorg-xmir', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xvfb', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xwayland', 'pkgver': '2:1.19.6-1ubuntu4.13'},
{'osver': '18.04', 'pkgname': 'xwayland-hwe-18.04', 'pkgver': '2:1.20.8-2ubuntu2.2~18.04.9'},
{'osver': '20.04', 'pkgname': 'xdmx', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xdmx-tools', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xnest', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xorg-server-source', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xserver-common', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xserver-xephyr', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xserver-xorg-core', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xserver-xorg-dev', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xserver-xorg-legacy', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xvfb', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '20.04', 'pkgname': 'xwayland', 'pkgver': '2:1.20.13-1ubuntu1~20.04.5'},
{'osver': '22.04', 'pkgname': 'xnest', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xorg-server-source', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xserver-common', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xserver-xephyr', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xserver-xorg-core', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xserver-xorg-dev', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xserver-xorg-legacy', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xvfb', 'pkgver': '2:21.1.3-2ubuntu2.5'},
{'osver': '22.04', 'pkgname': 'xwayland', 'pkgver': '2:22.1.1-1ubuntu0.4'}
];
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_HOLE,
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, 'xdmx / xdmx-tools / xmir / xnest / xorg-server-source / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 18.04 | cpe:/o:canonical:ubuntu_linux:18.04:-:lts |
canonical | ubuntu_linux | 20.04 | cpe:/o:canonical:ubuntu_linux:20.04:-:lts |
canonical | ubuntu_linux | 22.04 | cpe:/o:canonical:ubuntu_linux:22.04:-:lts |
canonical | ubuntu_linux | xdmx | p-cpe:/a:canonical:ubuntu_linux:xdmx |
canonical | ubuntu_linux | xdmx-tools | p-cpe:/a:canonical:ubuntu_linux:xdmx-tools |
canonical | ubuntu_linux | xmir | p-cpe:/a:canonical:ubuntu_linux:xmir |
canonical | ubuntu_linux | xnest | p-cpe:/a:canonical:ubuntu_linux:xnest |
canonical | ubuntu_linux | xorg-server-source | p-cpe:/a:canonical:ubuntu_linux:xorg-server-source |
canonical | ubuntu_linux | xorg-server-source-hwe-18.04 | p-cpe:/a:canonical:ubuntu_linux:xorg-server-source-hwe-18.04 |
canonical | ubuntu_linux | xserver-common | p-cpe:/a:canonical:ubuntu_linux:xserver-common |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4283
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-46340
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-46341
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-46342
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-46343
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-46344
ubuntu.com/security/notices/USN-5778-1