CVE-2015-2925 Security feature bypass in n/a

What is CVE-2015-2925?

CVE-2015-2925 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 16 Nov 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename actions inside a bind mount, which allows local users to bypass an intended container protection mechanism by renaming a directory, related to a "double-chroot attack."

Which versions are affected by CVE-2015-2925?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

How do I fix CVE-2015-2925?

Upgrade to a fixed version.

Is CVE-2015-2925 being exploited?

There is no known exploitation of CVE-2015-2925 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-2925, GHSA-v42c-fv3v-4g2f, UBUNTU-CVE-2015-2925.