[SECURITY] [DLA 2014-1] vino security update

Type debian
Reporter Debian
Modified 2019-11-29T08:31:28


Package : vino Version : 3.14.0-2+deb8u1 CVE ID : CVE-2014-6053 CVE-2018-7225 CVE-2019-15681 Debian Bug : 945784

Several vulnerabilities have been identified in the VNC code of vino, a desktop sharing utility for the GNOME desktop environment.

The vulnerabilities referenced below are issues that have originally been reported against Debian source package libvncserver. The vino source package in Debian ships a custom-patched and stripped down variant of libvncserver, thus some of libvncserver's security fixes required porting over.


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


An issue was discovered in LibVNCServer.
rfbProcessClientNormalMessage() in rfbserver.c did not sanitize
msg.cct.length, leading to access to uninitialized and potentially
sensitive data or possibly unspecified other impact (e.g., an integer
overflow) via specially crafted VNC packets.


LibVNC contained a memory leak (CWE-655) in VNC server code, which
allowed an attacker to read stack memory and could be abused for
information disclosure. Combined with another vulnerability, it could
be used to leak stack memory and bypass ASLR. This attack appeared to
be exploitable via network connectivity.

For Debian 8 "Jessie", these problems have been fixed in version 3.14.0-2+deb8u1.

We recommend that you upgrade your vino packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS


mike gabriel aka sunweaver (Debian Developer) fon: +49 (1520) 1976 148

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