CVE-2025-61985

Publication date 6 October 2025

Last updated 12 March 2026

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.6 · Low

Score breakdown

Description

ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used.

Read the notes from the security team

Why is this CVE low priority?

This issue is considered minor by OpenSSH developers

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
openssh 25.10 questing
Fixed 1:10.0p1-5ubuntu5.1
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 1:9.6p1-3ubuntu13.15
22.04 LTS jammy
Fixed 1:8.9p1-3ubuntu0.14
20.04 LTS focal
Fixed 1:8.2p1-4ubuntu0.13+esm1
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
openssh-ssh1 25.10 questing Ignored
25.04 plucky Ignored
24.04 LTS noble Ignored
22.04 LTS jammy Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Ignored

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Notes

mdeslaur

openssh-ssh1 is only provided for compatibility with old devices that cannot be upgraded to modern protocols. We will not be providing any security support for the openssh-ssh1 package as it is insecure and should be used in trusted environments only. This issue is considered "minor" by the OpenSSH developers. Also, it is not recommended to construct ssh commandlines from untrusted usernames and URLs. As such, setting priority as "low", this can be bundled in the next round of OpenSSH security updates. When fixing this, also include username validity checking added to 9.6.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
openssh

Severity score breakdown

Parameter Value
Base score 3.6 · Low
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

Other references

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