CVE-2016-1908
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-1908
Vendor advisory: secalert@redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1298741
Vendor advisory: secalert@redhat.com — https://anongit.mindrot.org/openssh.git/commit/?id=ed4ce82dbfa8a3a3c8ea6fa0db113c71e234416c
Vendor advisory: secalert@redhat.com — http://www.openssh.com/txt/release-7.2
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-1908.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | 8.0 | affected | |
| rhel | 6.0 | affected | |
| rhel | 7.0 | affected | |
| rhel | 7.2 | affected | |
| rhel | 7.3 | affected | |
| rhel | 7.4 | affected | |
| rhel | 7.5 | affected | |
| rhel | 7.6 | affected | |
| rhel | 7.7 | affected | |
| debian | bookworm | fixed | 1:7.2p1-1 |
| debian | bullseye | fixed | 1:7.2p1-1 |
| debian | forky | fixed | 1:7.2p1-1 |
| debian | sid | fixed | 1:7.2p1-1 |
| debian | trixie | fixed | 1:7.2p1-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| openbsd | openssh | {"endExcluding":"7.2"} | 7.2 |
References
- https://www.suse.com/security/cve/CVE-2016-1908.html
- http://openwall.com/lists/oss-security/2016/01/15/13
- http://rhn.redhat.com/errata/RHSA-2016-0465.html
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- http://www.openssh.com/txt/release-7.2
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/84427
- http://www.securitytracker.com/id/1034705
- https://anongit.mindrot.org/openssh.git/commit/?id=ed4ce82dbfa8a3a3c8ea6fa0db113c71e234416c
- https://bugzilla.redhat.com/show_bug.cgi?id=1298741
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.gentoo.org/glsa/201612-18
- https://security-tracker.debian.org/tracker/CVE-2016-1908
CWEs
CWE-287
Verify integrity in audit chain (admin only). AS-IS.