Improper Input Validation Affecting pam_ssh_agent_auth package, versions <0:0.10.3-1.11.68.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    4.5% (93rd percentile)

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  • Snyk ID SNYK-AMZN201803-PAMSSHAGENTAUTH-1708362
  • published 27 Sep 2021
  • disclosed 7 Aug 2016

How to fix?

Upgrade Amazon-Linux:2018.03 pam_ssh_agent_auth to version 0:0.10.3-1.11.68.amzn1 or higher.
This issue was patched in ALAS-2017-898.

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 auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.