The remote AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2023:2249 advisory.
A vulnerability classified as critical was found in X.org Server. Affected by this vulnerability is the function _GetCountedString of the file xkb/xkb.c. The manipulation leads to buffer overflow. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211051. (CVE-2022-3550)
A vulnerability, which was classified as problematic, has been found in X.org Server. Affected by this issue is the function ProcXkbGetKbdByName of the file xkb/xkb.c. The manipulation leads to memory leak. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211052.
(CVE-2022-3551)
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)
A vulnerability was found in X.Org. This security flaw occurs because the handler for the ScreenSaverSetAttributes request may write to memory after it has been freed. 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-2022-46343)
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 issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions. (CVE-2023-0494)
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
# AlmaLinux Security Advisory ALSA-2023:2249.
##
include('compat.inc');
if (description)
{
script_id(175663);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/05/14");
script_cve_id(
"CVE-2022-3550",
"CVE-2022-3551",
"CVE-2022-4283",
"CVE-2022-46340",
"CVE-2022-46341",
"CVE-2022-46342",
"CVE-2022-46343",
"CVE-2022-46344",
"CVE-2023-0494"
);
script_xref(name:"ALSA", value:"2023:2249");
script_name(english:"AlmaLinux 9 : xorg-x11-server-Xwayland (ALSA-2023:2249)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the
ALSA-2023:2249 advisory.
- A vulnerability classified as critical was found in X.org Server. Affected by this vulnerability is the
function _GetCountedString of the file xkb/xkb.c. The manipulation leads to buffer overflow. It is
recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is
VDB-211051. (CVE-2022-3550)
- A vulnerability, which was classified as problematic, has been found in X.org Server. Affected by this
issue is the function ProcXkbGetKbdByName of the file xkb/xkb.c. The manipulation leads to memory leak. It
is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211052.
(CVE-2022-3551)
- 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)
- A vulnerability was found in X.Org. This security flaw occurs because the handler for the
ScreenSaverSetAttributes request may write to memory after it has been freed. 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-2022-46343)
- 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 issue occurs due to a dangling pointer in DeepCopyPointerClasses
that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed
memory. This can lead to local privilege elevation on systems where the X server runs privileged and
remote code execution for ssh X forwarding sessions. (CVE-2023-0494)
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://errata.almalinux.org/9/ALSA-2023-2249.html");
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: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_cwe_id(119, 120, 121, 125, 401, 404, 416);
script_set_attribute(attribute:"vuln_publication_date", value:"2022/10/17");
script_set_attribute(attribute:"patch_publication_date", value:"2023/05/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/05/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:xorg-x11-server-Xwayland");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::baseos");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::crb");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::highavailability");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::nfv");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::realtime");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::resilientstorage");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap_hana");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::supplementary");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var pkgs = [
{'reference':'xorg-x11-server-Xwayland-21.1.3-7.el9', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'xorg-x11-server-Xwayland-21.1.3-7.el9', 'cpu':'x86_64', 'release':'9', '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;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'Alma-' + 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 (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
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-2022-3550
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3551
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
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0494
errata.almalinux.org/9/ALSA-2023-2249.html