CVE-2021-31155 Permissions bypass in pleaser
A local attacker can gain full root privileges by exploiting improper umask handling in the please tool.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31155?
CVE-2021-31155 is a high-severity vulnerability in n/a, published on 27 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.
Weakness: CWE-732
Which versions are affected by CVE-2021-31155?
3 open source packages ship an affected version, including pleaser. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pleaser crates.io | All versions | 0.4.0 |
pleaser crates.io | All versions | 0.4.0 |
pleaser crates.io | From 0.0.0-0 | 0.4.0 |
Products include Umask Project Umask.
How do I fix CVE-2021-31155?
Upgrade pleaser to 0.4.0 or later.
Is CVE-2021-31155 being exploited?
There is no known exploitation of CVE-2021-31155 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-31155, GHSA-vc5p-j8vw-mc6x, RUSTSEC-2021-0101.