CVE-2016-3115

Publication date 22 March 2016

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

6.4 · Medium

Score breakdown

Description

Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.

Read the notes from the security team

Status

Package Ubuntu Release Status
openssh 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Not affected
15.10 wily
Fixed 1:6.9p1-2ubuntu0.2
14.04 LTS trusty
Fixed 1:6.6p1-2ubuntu2.7
12.04 LTS precise
Fixed 1:5.9p1-5ubuntu1.9

Notes

sbeattie

with X forwarding enabled, could bypass ssh account restrictions

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 6.4 · Medium
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

Other references