CVE-2025-1944: picklescan — Exploit & Fix

Description

picklescan before 0.0.23 is vulnerable to a ZIP archive manipulation attack that causes it to crash when attempting to extract and scan PyTorch model archives. By modifying the filename in the ZIP header while keeping the original filename in the directory listing, an attacker can make PickleScan raise a BadZipFile error. However, PyTorch's more forgiving ZIP implementation still allows the model to be loaded, enabling malicious payloads to bypass detection.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Weakness Type (CWE)

CWE-345 CWE-345

Affected Products

Vendor	Product	Versions
mmaitre314	picklescan	< 0.0.23

References

Advisories & Patches

https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781 https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7q5r-7gvp-wc82

Exploits

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7q5r-7gvp-wc82

Other References

https://www.sonatype.com/security-advisories/cve-2025-1944

Frequently Asked Questions

What is CVE-2025-1944? +

picklescan before 0.0.23 is vulnerable to a ZIP archive manipulation attack that causes it to crash when attempting to extract and scan PyTorch model archives. By modifying the filename in the ZIP header while keeping the original filename in the directory listing, an attacker can make PickleScan raise a BadZipFile error. However, PyTorch's more forgiving ZIP implementation still allows the model to be loaded, enabling malicious payloads to bypass detection. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-1944? +

CVE-2025-1944 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-1944? +

CVE-2025-1944 affects products from mmaitre314, specifically: picklescan. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-1944? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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