CVE-2011-4327

Publication date 3 February 2014

Last updated 6 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

ssh-keysign.c in ssh-keysign in OpenSSH before 5.8p2 on certain platforms executes ssh-rand-helper with unintended open file descriptors, which allows local users to obtain sensitive key information via the ptrace system call.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openssh	11.10 oneiric	Not affected
	11.04 natty	Not affected
	10.10 maverick	Not affected
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not affected

How can I get the fixes?
What do statuses mean?

Notes

tyhicks

Per OpenSSH, platforms with /dev/random are not affected.

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

MITRE
NVD
Launchpad
Debian

Other references

http://www.openwall.com/lists/oss-security/2011/11/21/8
http://www.openssh.com/txt/release-5.8p2
http://www.openssh.com/txt/portable-keysign-rand-helper.adv
http://www.nessus.org/plugins/index.php?view=single&id=53841
https://www.cve.org/CVERecord?id=CVE-2011-4327