CVE-2014-6053

5.0 MEDIUM 7% exploit odds Fix listed Denial of service

What it is

The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 7.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2014-12-15 18:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:12 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 7.3% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2014-12-15 18:59 UTC
Last modified: 2026-06-17 00:12 UTC
Exploit probability: 7.3% · EPSS, next 30 days
Weakness: CWE-19
Record status: Modified

Affected

Libvncserver ≤ 0.9.9
Canonical Ubuntu Linux 12.04
Canonical Ubuntu Linux 14.04
Debian Linux 7.0

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2014-6053.md and follow it. Check whether this project is affected by CVE-2014-6053. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record