CVE-2023-0591 Path Traversal in ubi_reader

What is CVE-2023-0591?

CVE-2023-0591 is a medium-severity path traversal vulnerability in ubi_reader, published on 31 Jan 2023. 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

ubireader_extract_files is vulnerable to path traversal when run against specifically crafted UBIFS files, allowing the attacker to overwrite files outside of the extraction directory (provided the process has write access to that file or directory).

This is due to the fact that a node name (dent_node.name) is considered trusted and joined to the extraction directory path during processing, then the node content is written to that joined path. By crafting a malicious UBIFS file with node names holding path traversal payloads (e.g. ../../tmp/outside.txt), it's possible to force ubi_reader to write outside of the extraction directory.

This issue affects ubi-reader before 0.8.5.

Weakness: CWE-22

Which versions are affected by CVE-2023-0591?

3 open source packages ship an affected version, including ubi-reader. It affects 1 product.

Products include Ubi Reader Project Ubi Reader.

How do I fix CVE-2023-0591?

Upgrade ubi-reader to 0.8.5 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2023-0591 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0591 exists.

Other vulnerabilities in ubi_reader

• CVE-2022-4572 UBI Reader UBIFS File output.py ubireader_extract_files path traversal Medium 5.4

Sources

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

Also known as GHSA-vp2x-3mc3-3cj4, PYSEC-2023-51.