HighVulnerability
CVE-2021-39207: parlai arbitrary code execution through unsafe YAML deserialization
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2021-39207
- Published
- Record updated
- Affected
- parlai < 1.1.0
- Fixed in
- 1.1.0
- released March 1, 2021, 193 days before disclosure
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 1.8%
Summary
ParlAI, a framework for training and evaluating AI models on open dialogue datasets, is vulnerable to a YAML deserialization attack in affected versions. The flaw comes from unsafe loading, which leads to arbitrary code execution.
Mitigation
Patched by avoiding unsafe loading; users should update to version above v1.1.0. If upgrading is not possible, change the Loader to SafeLoader as a workaround. See commit 507d066ef432ea27d3e201da08009872a2f37725 for details.
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