CVE-2016-1908
openssh: possible fallback from untrusted to trusted X11 forwarding
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · January 14, 2016
Updated · May 13, 2026
Description
An access flaw was discovered in OpenSSH; the OpenSSH client did not correctly handle failures to generate authentication cookies for untrusted X11 forwarding. A malicious or compromised remote X application could possibly use this flaw to establish a trusted connection to the local X server, even if only untrusted X11 forwarding was requested.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.9AV:N/AC:M/Au:S/C:P/I:P/A:N
CWE-284 · Improper Access Control