CVE-2020-10737 Race condition in oddjob
An attacker can exploit a race condition in mkhomedir to change ownership of arbitrary directories via symlinks, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-10737?
CVE-2020-10737 is a medium-severity vulnerability in Red Hat oddjob, published on 27 May 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A race condition was found in the mkhomedir tool shipped with the oddjob package in versions before 0.34.5 and 0.34.6 wherein, during the home creation, mkhomedir copies the /etc/skel directory into the newly created home and changes its ownership to the home's user without properly checking the homedir path. This flaw allows an attacker to leverage this issue by creating a symlink point to a target folder, which then has its ownership transferred to the new home directory's unprivileged user.
Weakness: CWE-362
Which versions are affected by CVE-2020-10737?
It affects 1 product.
Linux distribution packages (6)
oddjob Red Hat:enterprise_linux:8::appstream | All versions | 0:0.34.5-3.el8 |
oddjob-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.34.5-3.el8 |
oddjob-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:0.34.5-3.el8 |
oddjob-mkhomedir Red Hat:enterprise_linux:8::appstream | All versions | 0:0.34.5-3.el8 |
oddjob-mkhomedir-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.34.5-3.el8 |
oddjob openSUSE:Tumbleweed | All versions | 0.34.5-1.9 |
Products include Redhat Oddjob.
How do I fix CVE-2020-10737?
Upgrade to a fixed version.
Is CVE-2020-10737 being exploited?
There is no known exploitation of CVE-2020-10737 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2020-10737, GHSA-m6xw-hhwx-7qjc, RHSA-2020:4687, UBUNTU-CVE-2020-10737, USN-5169-1, openSUSE-SU-2024:11109-1.