CVE-2025-61984
- State
- Published
- Severity
- 3.6 Low
- Published
- Oct 6, 2025
- Updated
- Oct 15, 2026
- Reserved
- Oct 6, 2025
Description
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.)
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.6 Low | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N | mitre |
Weaknesses
- CWE-159 Improper Handling of Invalid Use of Special Elements
Affected Products
| Product | Versions |
|---|---|
OpenSSHOpenBSD |
|
References
- https://www.openwall.com/lists/oss-security/2025/10/06/1
- https://marc.info/?l=openssh-unix-dev&m=175974522032149&w=2
- https://www.openssh.com/releasenotes.html#10.1p1
- https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984exploit
- http://www.openwall.com/lists/oss-security/2025/10/07/1
- http://www.openwall.com/lists/oss-security/2025/10/12/1
- https://www.vicarius.io/vsociety/posts/cve-2025-61984-detection-script-remote-code-execution-vulnerability-affecting-openssh
- https://www.vicarius.io/vsociety/posts/cve-2025-61984-mitigation-script-remote-code-execution-vulnerability-affecting-openssh
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
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