Failure to Sanitize Special Element Affecting openssh-server package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-RHEL6-OPENSSHSERVER-13508618
  • published9 Oct 2025
  • disclosed6 Oct 2025

Introduced: 6 Oct 2025

NewCVE-2025-61984  (opens in a new tab)
CWE-159  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:6 openssh-server.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-server package and not the openssh-server package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)

CVSS Base Scores

version 3.1