CVE-2016-1908

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional 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

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

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

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