CVE-2020-28949 PEAR Archive_Tar Deserialization of Untrusted Data
Attackers can overwrite arbitrary files via stream wrapper attacks in the Archive_Tar library due to insufficient filename sanitization.
- Exploited in the wild
- Since 25 Aug 2022
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-28949?
CVE-2020-28949 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 19 Nov 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
Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.
Which versions are affected by CVE-2020-28949?
It affects 4 products.
Products include Debian Debian Linux, Drupal Drupal, Fedoraproject Fedora, Php Archive Tar.
How do I fix CVE-2020-28949?
Upgrade to a fixed version. US federal agencies must fix it by 15 Sep 2022.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-28949 being exploited?
Yes. Attackers have exploited CVE-2020-28949 in the wild since at least 25 Aug 2022.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as CLEANSTART-2024-ZN01309, DEBIAN-CVE-2020-28949, UBUNTU-CVE-2020-28949.