Deserialization in Facebook Parlai
CVE-2021-39207
parlai is a framework for training and evaluating AI models on a variety of openly available dialogue datasets. In affected versions the package is vulnerable to YAML deserialization attack caused by unsafe loading which leads to Arbitary code execution. This security bug is patched by avoiding unsafe loader users should update to version above v1.1.0. If upgrading is not possible then users can change the Loader used to SafeLoader as a workaround. See commit 507d066ef432ea27d3e201da08009872a2f37725 for details.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.018 (77.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Facebook Parlai
- Facebookresearch Parlai — versions < 1.1.0
Weakness classification (CWE)
References
- github.com/facebookresearch/ParlAI/security/advisories/GHSA-m87f-9fvv-2mgg (Patch, Third Party Advisory)
- github.com/facebookresearch/ParlAI/commit/4374fa2aba383db6526ab36e939eb1cf8ef99… (Patch, Third Party Advisory)
- github.com/facebookresearch/ParlAI/commit/507d066ef432ea27d3e201da08009872a2f37… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39207?
- CVE-2021-39207 is a high-severity vulnerability in Facebook Parlai, classified under Deserialization of Untrusted Data. CVSS score: 8.4/10. Published 2021-09-10.
- How severe is CVE-2021-39207?
- High severity. CVSS v3 base score is 8.4 out of 10.