CVE-2016-1908 Auth bypass in n/a
Remote X11 clients can obtain trusted forwarding privileges by exploiting OpenSSH client cookie generation failures and local X11 server configuration issues.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-1908?
CVE-2016-1908 is a critical authentication bypass vulnerability in Debian Debian Linux, published on 11 Apr 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2016-1908?
It affects 9 products.
Products include Debian Debian Linux, OpenSSH, Oracle Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server and 3 more.
How do I fix CVE-2016-1908?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2016-1908 being exploited?
There is no known exploitation of CVE-2016-1908 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2016-1908, GHSA-mgwc-m57j-46w8, UBUNTU-CVE-2016-1908.