CVE-2022-44900 py7zr directory traversal vulnerability
Attackers can write arbitrary files to the filesystem by extracting a crafted 7z archive using the py7zr library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-44900?
CVE-2022-44900 is a critical path traversal vulnerability in n/a, published on 6 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A directory traversal vulnerability in the SevenZipFile.extractall() function of the python library py7zr v0.20.0 and earlier allows attackers to write arbitrary files via extracting a crafted 7z file.
Weakness: CWE-22
Which versions are affected by CVE-2022-44900?
3 open source packages ship an affected version, including py7zr. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
py7zr PyPI | All versions | 0.20.1 |
py7zr PyPI | All versions | 0.20.1 |
py7zr PyPI | All versions | 0.20.1 |
Linux distribution packages (1)
python-py7zr openSUSE:Tumbleweed | All versions | 0.20.8-2.6 |
Products include Py7zr Project Py7zr.
How do I fix CVE-2022-44900?
Upgrade py7zr to 0.20.1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2022-44900 being exploited?
There is no known exploitation of CVE-2022-44900 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2022-44900, DSA-5652-1, GHSA-m8xw-9x5x-6vh3, PYSEC-2022-42998, UBUNTU-CVE-2022-44900, USN-7030-1 and 2 more.