CVE-2016-1908

CRITICAL
9.8
CVSS Score
Published: April 11, 2017 at 12:00 AM UTC
Updated: June 17, 2026 at 12:42 AM UTC
9 products affected across 4 vendorsDebian LinuxEnterprise Linux DesktopEnterprise Linux Server

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Severity
CRITICAL9.8
Exploit prediction
EPSS 14%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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