CVE-2013-2207

Publication date 9 October 2013

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

pt_chown in GNU C Library (aka glibc or libc6) before 2.18 does not properly check permissions for tty files, which allows local users to change the permission on the files and obtain access to arbitrary pseudo-terminals by leveraging a FUSE file system.

From the Ubuntu Security Team

Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information.

Read the notes from the security team

Status

Package Ubuntu Release Status
eglibc 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
15.04 vivid Not in release
14.04 LTS trusty
Fixed 2.19-0ubuntu6.8
12.04 LTS precise
Fixed 2.15-0ubuntu10.14
glibc 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Not affected
15.10 wily
Fixed 2.21-0ubuntu4.2
15.04 vivid Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release

Notes

mdeslaur

patch disables building of pt_chown We can't just remove pt_chown from older releases, as unfortunately a lot of stuff still needs it, like lxc for example. We'll need to identify them first and fix them at the same time. While this CVE was originally marked as fixed in 2.17-93ubuntu2, it got reverted in 2.17-93ubuntu4.

Patch details

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

Package Patch details
eglibc

References

Related Ubuntu Security Notices (USN)

    • USN-2985-1
    • GNU C Library vulnerabilities
    • 25 May 2016

Other references