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Advisories

Fujitsu OneCompression 1.2.0 Arbitrary Code Execution via torch.load Deserialization

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severity
high
date
Affecting

  • OneCompression <= 1.2.0, fixed in 1.2.1

CWE
  • CWE-502 Deserialization of Untrusted Data
CVSS
8.4
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Nir Yehoshua from Cipher Security Labs
Description
Fujitsu Research's OneCompression library 1.2.0 contains an unsafe deserialization vulnerability that allows attackers to execute arbitrary code by supplying a crafted model.pt checkpoint file, as QuantizedModelLoader.load_quantized_model_pt() unconditionally calls torch.load with weights_only=False, invoking Python's pickle machinery during deserialization. Attackers can embed malicious __reduce__ methods in a crafted model checkpoint to execute arbitrary Python code, including system commands, when the library loads the file from a caller-selected model directory.

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