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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6053
Reference (s):
- https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
- DEBIAN:DSA-3081
- URL: http://www.debian.org/security/2014/dsa-3081
- GENTOO:GLSA-201507-07
- URL: https://security.gentoo.org/glsa/201507-07