Description
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.
Published: 2023-09-13
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2023-43931 A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.
Ubuntu USN Ubuntu USN USN-6567-1 QEMU vulnerabilities
History

Fri, 17 Oct 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 22 Nov 2024 12:00:00 +0000

Type Values Removed Values Added
References

Fri, 13 Sep 2024 19:45:00 +0000

Type Values Removed Values Added
References

Subscriptions

Fedoraproject Fedora
Qemu Qemu
Redhat Advanced Virtualization Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-08T06:30:19.755Z

Reserved: 2023-06-14T21:08:31.376Z

Link: CVE-2023-3255

cve-icon Vulnrichment

Updated: 2024-08-02T06:48:08.172Z

cve-icon NVD

Status : Modified

Published: 2023-09-13T17:15:09.877

Modified: 2024-11-21T08:16:48.617

Link: CVE-2023-3255

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-07-04T00:00:00Z

Links: CVE-2023-3255 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses