CVE-2014-6053 Information

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.

Reference

http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html http://seclists.org/oss-sec/2014/q3/639 http://secunia.com/advisories/61506 http://secunia.com/advisories/61682 http://ubuntu.com/usn/usn-2365-1 http://www.debian.org/security/2014/dsa-3081 http://www.ocert.org/advisories/ocert-2014-007.html http://www.openwall.com/lists/oss-security/2014/09/25/11 https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28 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/