CVE-2023-6683
QEMU VNC Server NULL Pointer Dereference DoS Vulnerability
Description
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.
INFO
Published Date :
Jan. 12, 2024, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 8:44 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-6683.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-6683 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6683 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2024:2135 Added Reference https://access.redhat.com/errata/RHSA-2024:2962 Added Reference https://access.redhat.com/security/cve/CVE-2023-6683 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2254825 Added Reference https://security.netapp.com/advisory/ntap-20240223-0001/ -
CVE Modified by [email protected]
Sep. 14, 2024
Action Type Old Value New Value Removed Reference Red Hat, Inc. https://security.netapp.com/advisory/ntap-20240223-0001/ -
CVE Modified by [email protected]
May. 22, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:2962 [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 30, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:2135 [No types assigned] -
Modified Analysis by [email protected]
Apr. 26, 2024
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20240223-0001/ No Types Assigned https://security.netapp.com/advisory/ntap-20240223-0001/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:* OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions from (including) 6.1.0 up to (excluding) 9.0.0 -
CVE Modified by [email protected]
Feb. 23, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://security.netapp.com/advisory/ntap-20240223-0001/ [No types assigned] -
Initial Analysis by [email protected]
Jan. 22, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-6683 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-6683 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2254825 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2254825 Issue Tracking, Patch Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* -
CVE Received by [email protected]
Jan. 12, 2024
Action Type Old Value New Value Added Description A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service. Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-6683 [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2254825 [No types assigned] Added CWE Red Hat, Inc. CWE-476 Added CVSS V3.1 Red Hat, Inc. AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-6683 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-6683
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.01%
score
0.29304
percentile