Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libvncserver | Libvncserver | <= 0.9.9 |
| Canonical | Ubuntu Linux | 12.04 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
- http://seclists.org/oss-sec/2014/q3/639Mailing ListThird Party Advisory
- http://secunia.com/advisories/61506
- http://secunia.com/advisories/61682
- http://ubuntu.com/usn/usn-2365-1Third Party Advisory
- http://www.debian.org/security/2014/dsa-3081Third Party Advisory
- http://www.ocert.org/advisories/ocert-2014-007.htmlThird Party AdvisoryUS Government Resource
- http://www.openwall.com/lists/oss-security/2014/09/25/11Mailing ListThird Party Advisory
- https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7cIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
- https://security.gentoo.org/glsa/201507-07
- https://usn.ubuntu.com/4573-1/
- https://usn.ubuntu.com/4587-1/
FAQ
What is CVE-2014-6053?
CVE-2014-6053 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 re...
How severe is CVE-2014-6053?
CVE-2014-6053 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2014-6053?
Check the references section above for vendor advisories and patch information. Affected products include: Libvncserver Libvncserver, Canonical Ubuntu Linux, Debian Debian Linux.