Out-of-Bounds Affecting pam_ssh_agent_auth package, versions <0:0.9.3-9.23.59.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.27% (69th percentile)

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  • Snyk ID SNYK-AMZN201803-PAMSSHAGENTAUTH-1693277
  • published 27 Sep 2021
  • disclosed 14 Jan 2016

How to fix?

Upgrade Amazon-Linux:2018.03 pam_ssh_agent_auth to version 0:0.9.3-9.23.59.amzn1 or higher.
This issue was patched in ALAS-2016-638.

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 (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.

References

CVSS Scores

version 3.1
Expand this section

Red Hat

5.6 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low