CVE-2014-2653

Publication date 27 March 2014

Last updated 6 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

The verify_host_key function in sshconnect.c in the client in OpenSSH 6.6 and earlier allows remote servers to trigger the skipping of SSHFP DNS RR checking by presenting an unacceptable HostCertificate.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openssh	13.10 saucy	Fixed 1:6.2p2-6ubuntu0.3
	12.10 quantal	Fixed 1:6.0p1-3ubuntu1.2
	12.04 LTS precise	Fixed 1:5.9p1-5ubuntu1.3
	10.04 LTS lucid	Not affected

Notes

mdeslaur

code is different in lucid, and doesn't seem vulnerable

Patch details

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

Package	Patch details
openssh	Vendor: http://anonscm.debian.org/gitweb/?p=pkg-ssh/openssh.git;a=commit;h=63d5fa28e16d96db6bac2dbe3fcecb65328f8966 Upstream: http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshconnect.c.diff?r1=1.246;r2=1.247

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-2164-1
OpenSSH vulnerability
7 April 2014