Description
picklescan before 1.0.3 contains a scanning bypass vulnerability in the scan_pytorch function that allows attackers to embed malicious magic numbers via dynamic eval using the __reduce__ trick. Attackers can craft malicious PyTorch payloads that evade picklescan detection while remaining executable, enabling arbitrary code execution when loaded with torch.load().
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
- picklescan / picklescan0 – 1.0.3
- picklescan / picklescan1.0.3 – 1.0.3
References
- VENDOR_ADVISORYhttps://github.com/mmaitre314/picklescan/security/advisories/GHSA-97f8-7cmv-76j2
- PATCHhttps://github.com/mmaitre314/picklescan/commit/2a8383cfeb4158567f9770d86597300c9e508d0f
- PATCHhttps://github.com/mmaitre314/picklescan/commit/134179474539648ba7dee1317959529fbd0e7f89
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/picklescan-scanning-bypass-via-dynamic-eval-in-scan-pytorch