CVE-2016-1908 | BDVDB-2026-83985 Detail
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.
Weaknesses#
- CWE-287 Improper Authentication
References#
- http://www.openssh.com/txt/release-7.2
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- https://anongit.mindrot.org/openssh.git/commit/?id=ed4ce82dbfa8a3a3c8ea6fa0db113c71e234416c
- http://openwall.com/lists/oss-security/2016/01/15/13
- http://www.securitytracker.com/id/1034705
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- https://security.gentoo.org/glsa/201612-18
- https://bugzilla.redhat.com/show_bug.cgi?id=1298741
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- http://www.securityfocus.com/bid/84427
- http://rhn.redhat.com/errata/RHSA-2016-0465.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.