CVE-2023-51385

medium

Description

In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host name has shell metacharacters, and this name is referenced by an expansion token in certain situations. For example, an untrusted Git repository can have a submodule with shell metacharacters in a user name or host name.

References

https://www.debian.org/security/2023/dsa-5586

https://vin01.github.io/piptagole/ssh/security/openssh/libssh/remote-code-execution/2023/12/20/openssh-proxycommand-libssh-rce.html

https://security.gentoo.org/glsa/202312-17

https://lists.debian.org/debian-lts-announce/2023/12/msg00017.html

http://www.openwall.com/lists/oss-security/2023/12/26/4

https://www.cisa.gov/news-events/ics-advisories/icsa-25-162-05

https://www.cisa.gov/news-events/ics-advisories/icsa-25-044-09

https://securelist.com/exploits-and-vulnerabilities-q3-2024/114839/

https://www.openwall.com/lists/oss-security/2023/12/18/2

https://www.openssh.com/txt/release-9.6

https://support.apple.com/kb/HT214084

https://security.netapp.com/advisory/ntap-20240105-0005/

https://github.com/openssh/openssh-portable/commit/7ef3787c84b6b524501211b11a26c742f829af1a

http://www.openwall.com/lists/oss-security/2025/10/12/1

http://www.openwall.com/lists/oss-security/2025/10/07/1

http://seclists.org/fulldisclosure/2024/Mar/21

Details

Source: Mitre, NVD

Published: 2023-12-18

Updated: 2025-12-18

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.14453