The client in OpenSSH before 7.2 mishandles failed cookie generation...
Vulnerability 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 Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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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CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.