CVE-2023-6683

MEDIUM EPSS 65.9%
Published Jan 12, 20242y ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Jan 12, 2024 2y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
65.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
qemuqemu*≥6.1.0  –  <8.2.2
redhatenterprise_linux8.0any
redhatenterprise_linux9.0any

References 5

  • access.redhat.com https://access.redhat.com/errata/RHSA-2024:2135
    Third Party Advisory
  • access.redhat.com https://access.redhat.com/errata/RHSA-2024:2962
    Third Party Advisory
  • access.redhat.com https://access.redhat.com/security/cve/CVE-2023-6683
    Third Party Advisory
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2254825
    Issue TrackingPatch
  • security.netapp.com https://security.netapp.com/advisory/ntap-20240223-0001/
    Third Party Advisory

Remediation