Improper Access Control Affecting openssh-askpass package, versions <0:6.6.1p1-25.el7_2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.5% (78th percentile)

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  • Snyk IDSNYK-RHEL7-OPENSSHASKPASS-4625772
  • published26 Jul 2021
  • disclosed14 Jan 2016

Introduced: 14 Jan 2016

CVE-2016-1908  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade RHEL:7 openssh-askpass to version 0:6.6.1p1-25.el7_2 or higher.
This issue was patched in RHSA-2016:0465.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-askpass package and not the openssh-askpass package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1