1. Ubuntu Security Notices
  2. USN-7030-1

USN-7030-1: py7zr vulnerability

Publication date

24 September 2024

Overview

py7zr could be made to create arbitrary files when extracting the contents of a specially crafted 7z archive.

Releases

Packages

  • py7zr - Pure Python 7-zip library

Details

It was discovered that py7zr was vulnerable to path traversal attacks.
If a user or automated system were tricked into extracting a specially
crafted 7z archive, an attacker could possibly use this issue to write
arbitrary files outside the target directory on the host.

It was discovered that py7zr was vulnerable to path traversal attacks.
If a user or automated system were tricked into extracting a specially
crafted 7z archive, an attacker could possibly use this issue to write
arbitrary files outside the target directory on the host.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
22.04 jammy python3-py7zr –  0.11.3+dfsg-4ubuntu0.1

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References

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