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CVE-2016-1908

Published: 15 January 2016

The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11 server, as demonstrated by lack of the SECURITY extension on this X11 server.

Priority

Low

CVSS 3 base score: 9.8

Status

Package Release Status
openssh
Launchpad, Ubuntu, Debian
precise
Released (1:5.9p1-5ubuntu1.9)
trusty
Released (1:6.6p1-2ubuntu2.7)
upstream
Released (7.2)
vivid Ignored
(reached end-of-life)
wily
Released (1:6.9p1-2ubuntu0.2)
xenial Not vulnerable
(1:7.2p2-4)
yakkety Not vulnerable
(1:7.2p2-5)
zesty Not vulnerable
(1:7.2p2-5)