Medium severity · published Jan 12, 2024
CVE-2023-6683
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages
6.5
CVSS
1.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
QE
Qemu · Qemu
6.1.0 before 8.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6683
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6683
Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2135
Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2962
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-6683
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2254825
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240223-0001/
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