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
8.3 High
AI Score
Confidence
High
0.036 Low
EPSS
Percentile
91.7%
The version of tigervnc installed on the remote host is prior to 1.12.0 / 1.13.1. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2023-317-01 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, which was classified as problematic, was found in X.org Server. This affects an unknown part of the file hw/xquartz/X11Controller.m of the component xquartz. The manipulation leads to denial of service. It is recommended to apply a patch to fix this issue. The identifier VDB-211053 was assigned to this vulnerability. (CVE-2022-3553)
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)
A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation.
If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.
(CVE-2023-1393)
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 use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if the pointer is warped from within a window on one screen to the root window of the other screen and if the original window is destroyed followed by another window being destroyed. (CVE-2023-5380)
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 Slackware Security Advisory SSA:2023-317-01. The text
# itself is copyright (C) Slackware Linux, Inc.
##
include('compat.inc');
if (description)
{
script_id(185502);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/13");
script_cve_id(
"CVE-2022-3550",
"CVE-2022-3551",
"CVE-2022-3553",
"CVE-2022-4283",
"CVE-2022-46340",
"CVE-2022-46341",
"CVE-2022-46342",
"CVE-2022-46343",
"CVE-2022-46344",
"CVE-2023-0494",
"CVE-2023-1393",
"CVE-2023-5367",
"CVE-2023-5380"
);
script_name(english:"Slackware Linux 15.0 / current tigervnc Multiple Vulnerabilities (SSA:2023-317-01)");
script_set_attribute(attribute:"synopsis", value:
"The remote Slackware Linux host is missing a security update to tigervnc.");
script_set_attribute(attribute:"description", value:
"The version of tigervnc installed on the remote host is prior to 1.12.0 / 1.13.1. It is, therefore, affected by multiple
vulnerabilities as referenced in the SSA:2023-317-01 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, which was classified as problematic, was found in X.org Server. This affects an unknown
part of the file hw/xquartz/X11Controller.m of the component xquartz. The manipulation leads to denial of
service. It is recommended to apply a patch to fix this issue. The identifier VDB-211053 was assigned to
this vulnerability. (CVE-2022-3553)
- 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)
- A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation.
If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a
dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.
(CVE-2023-1393)
- 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 use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and
legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if
the pointer is warped from within a window on one screen to the root window of the other screen and if the
original window is destroyed followed by another window being destroyed. (CVE-2023-5380)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# http://www.slackware.com/security/viewer.php?l=slackware-security&y=2023&m=slackware-security.389029
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?156b6c34");
script_set_attribute(attribute:"solution", value:
"Upgrade the affected tigervnc 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_set_attribute(attribute:"vuln_publication_date", value:"2022/10/17");
script_set_attribute(attribute:"patch_publication_date", value:"2023/11/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/13");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:tigervnc");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:15.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Slackware 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/Slackware/release", "Host/Slackware/packages");
exit(0);
}
include("slackware.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);
var flag = 0;
var constraints = [
{ 'fixed_version' : '1.12.0', 'product' : 'tigervnc', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '4_slack15.0', 'arch' : 'i586' },
{ 'fixed_version' : '1.12.0', 'product' : 'tigervnc', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '4_slack15.0', 'arch' : 'x86_64' },
{ 'fixed_version' : '1.13.1', 'product' : 'tigervnc', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '2', 'arch' : 'i586' },
{ 'fixed_version' : '1.13.1', 'product' : 'tigervnc', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '2', 'arch' : 'x86_64' }
];
foreach var constraint (constraints) {
var pkg_arch = constraint['arch'];
var arch = NULL;
if (pkg_arch == "x86_64") {
arch = pkg_arch;
}
if (slackware_check(osver:constraint['os_version'],
arch:arch,
pkgname:constraint['product'],
pkgver:constraint['fixed_version'],
pkgarch:pkg_arch,
pkgnum:constraint['service_pack'])) flag++;
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : slackware_report_get()
);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
slackware | slackware_linux | tigervnc | p-cpe:/a:slackware:slackware_linux:tigervnc |
slackware | slackware_linux | cpe:/o:slackware:slackware_linux | |
slackware | slackware_linux | 15.0 | cpe:/o:slackware:slackware_linux:15.0 |
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-2022-3553
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
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1393
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5367
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5380
www.nessus.org/u?156b6c34
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
8.3 High
AI Score
Confidence
High
0.036 Low
EPSS
Percentile
91.7%