Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2016-1908

Disclosure Date: April 11, 2017 •
CVE-2016-1908 CVSS v3 Base Score: 9.8
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • openbsd,
  • oracle,
  • redhat

Products

  • debian linux 8.0,
  • enterprise linux desktop 6.0,
  • enterprise linux desktop 7.0,
  • enterprise linux eus 7.2,
  • enterprise linux eus 7.3,
  • enterprise linux eus 7.4,
  • enterprise linux eus 7.5,
  • enterprise linux eus 7.6,
  • enterprise linux eus 7.7,
  • enterprise linux server 6.0,
  • enterprise linux server 7.0,
  • enterprise linux server aus 7.2,
  • enterprise linux server aus 7.3,
  • enterprise linux server aus 7.4,
  • enterprise linux server aus 7.6,
  • enterprise linux server aus 7.7,
  • enterprise linux server tus 7.2,
  • enterprise linux server tus 7.3,
  • enterprise linux server tus 7.6,
  • enterprise linux server tus 7.7,
  • enterprise linux workstation 6.0,
  • enterprise linux workstation 7.0,
  • linux 6,
  • linux 7,
  • openssh
Technical Analysis