Security Features Affecting pam_ssh_agent_auth package, versions <0:0.9.3-9.25.61.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.37% (73rd percentile)

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  • Snyk ID SNYK-AMZN201803-PAMSSHAGENTAUTH-1694283
  • published 27 Sep 2021
  • disclosed 11 Apr 2017

How to fix?

Upgrade Amazon-Linux:2018.03 pam_ssh_agent_auth to version 0:0.9.3-9.25.61.amzn1 or higher.
This issue was patched in ALAS-2016-675.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pam_ssh_agent_auth package and not the pam_ssh_agent_auth package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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
Expand this section

NVD

9.8 critical
  • 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
Expand this section

Red Hat

4.6 medium