9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.2 High
AI Score
Confidence
High
0.273 Low
EPSS
Percentile
96.8%
The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2024:2996 advisory.
A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible escalation of privileges or denial of service. (CVE-2023-5367)
A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)
A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information. (CVE-2023-6478)
A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device’s particular number of buttons, leading to a heap overflow if a bigger value was used. (CVE-2023-6816)
An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a device frozen by a sync grab is reattached to a different master device. This issue may lead to an application crash, local privilege escalation (if the server runs with extended privileges), or remote code execution in SSH X11 forwarding environments. (CVE-2024-0229)
A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
(CVE-2024-0408)
A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of private at creation. It uses the cursor bits type with the cursor as private, and when initiating the cursor, that overwrites the XSELINUX context. (CVE-2024-0409)
A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution in SSH X11 forwarding environments. (CVE-2024-21885)
A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding environments. (CVE-2024-21886)
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 package checks in this plugin were extracted from
# Red Hat Security Advisory RHSA-2024:2996. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(197667);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/22");
script_cve_id(
"CVE-2023-5367",
"CVE-2023-6377",
"CVE-2023-6478",
"CVE-2023-6816",
"CVE-2024-0229",
"CVE-2024-0408",
"CVE-2024-0409",
"CVE-2024-21885",
"CVE-2024-21886"
);
script_xref(name:"RHSA", value:"2024:2996");
script_name(english:"CentOS 8 : xorg-x11-server-Xwayland (CESA-2024:2996)");
script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the
CESA-2024:2996 advisory.
- A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect
calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function
in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible
escalation of privileges or denial of service. (CVE-2023-5367)
- A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to
a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or
possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)
- A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or
RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive
information. (CVE-2023-6478)
- A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for
each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the
X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap
overflow if a bigger value was used. (CVE-2023-6816)
- An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a
device frozen by a sync grab is reattached to a different master device. This issue may lead to an
application crash, local privilege escalation (if the server runs with extended privileges), or remote
code execution in SSH X11 forwarding environments. (CVE-2024-0229)
- A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the
buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a
GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the
XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
(CVE-2024-0408)
- A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of
private at creation. It uses the cursor bits type with the cursor as private, and when initiating the
cursor, that overwrites the XSELINUX context. (CVE-2024-0409)
- A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the
allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can
trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution
in SSH X11 forwarding environments. (CVE-2024-21885)
- A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may
lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding
environments. (CVE-2024-21886)
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://access.redhat.com/errata/RHSA-2024:2996");
script_set_attribute(attribute:"solution", value:
"Update the affected xorg-x11-server-Xwayland package.");
script_set_cvss_base_vector("CVSS2#AV:N/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:N/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-2023-6816");
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:"2023/10/25");
script_set_attribute(attribute:"patch_publication_date", value:"2024/05/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/22");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8-stream");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:xorg-x11-server-Xwayland");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CentOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/CentOS/release');
if (isnull(os_release) || 'CentOS' >!< os_release) audit(AUDIT_OS_NOT, 'CentOS');
var os_ver = pregmatch(pattern: "CentOS(?: Stream)?(?: Linux)? release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if ('CentOS Stream' >!< os_release) audit(AUDIT_OS_NOT, 'CentOS 8-Stream');
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'CentOS 8.x', 'CentOS ' + os_ver);
if (!get_kb_item('Host/CentOS/rpm-list')) 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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS', cpu);
var pkgs = [
{'reference':'xorg-x11-server-Xwayland-21.1.3-15.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'xorg-x11-server-Xwayland-21.1.3-15.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'CentOS-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && _release) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'xorg-x11-server-Xwayland');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5367
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6377
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6478
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6816
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0229
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0408
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0409
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-21885
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-21886
access.redhat.com/errata/RHSA-2024:2996
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.2 High
AI Score
Confidence
High
0.273 Low
EPSS
Percentile
96.8%