Advisory details:
github_osv / GHSA-vqmv-47xg-9wpr
| Advisory ID | github_osv/GHSA-vqmv-47xg-9wpr |
| Aliases | |
| Summary | Picklescan missing detection when calling pty.spawn ### Summary Using pty.spawn, which is a built-in python library function to execute arbitrary commands on the host system. ### Details The attack payload executes in the following steps: First, the attacker craft the payload by calling to `pty.spawn` function in the `__reduce__` method. Then the victim attempts to use picklescan to scan the pickle file for issues and sees this - ``` ----------- SCAN SUMMARY ----------- Scanned files: 1 Infected files: 0 Dangerous globals: 0 ``` The victim proceeds to load the pickle file and execute attacker-injected arbitrary code. ### PoC ``` class PtyExploit: def __reduce__(self): return (pty.spawn, (["/bin/sh", "-c", "id; exit"],)) ``` ### Impact **Who is impacted?** Any organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models. **What is the impact?** Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded. **Supply Chain Attack**: Attackers can distribute infected pickle files across ML models, APIs, or saved Python objects. ### Collaborators https://github.com/ajohnston9 https://github.com/geo-lit |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 8.0 |
| Risk | 4.0 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv4 | 8.9 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-vqmv-47xg-9wpr/GHSA-vqmv-47xg-9wpr.json |
| generic_textual | HIGH |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
There are no SSVC decisions available.