[USN-7030-1] py7zr vulnerability

[Shishir Subedi]

==========================================================================
Ubuntu Security Notice USN-7030-1
September 24, 2024

py7zr vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

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

Software Description:
- 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.

Update instructions:

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

Ubuntu 22.04 LTS
   python3-py7zr                   0.11.3+dfsg-4ubuntu0.1

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

References:
   https://ubuntu.com/security/notices/USN-7030-1
   CVE-2022-44900

Package Information:
   https://launchpad.net/ubuntu/+source/py7zr/0.11.3+dfsg-4ubuntu0.1

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