Deserialization in Commonwl Cwlviewer
CVE-2021-41110
cwlviewer is a web application to view and share Common Workflow Language workflows. Versions prior to 1.3.1 contain a Deserialization of Untrusted Data vulnerability. Commit number f6066f09edb70033a2ce80200e9fa9e70a5c29de (dated 2021-09-30) contains a patch. There are no available workarounds aside from installing the patch. The SnakeYaml constructor, by default, allows any data to be parsed. To fix the issue the object needs to be created with a `SafeConstructor` object, as seen in the patch.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.028 (86.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Commonwl Cwlviewer
- Common-Workflow-Language Cwlviewer — versions < 1.3.1
Weakness classification (CWE)
References
- github.com/common-workflow-language/cwlviewer/security/advisories/GHSA-7g7j-f5g… (Patch, Third Party Advisory)
- github.com/common-workflow-language/cwlviewer/commit/f6066f09edb70033a2ce80200e… (Patch, Third Party Advisory)
- www.fatalerrors.org/a/analysis-of-the-snakeyaml-deserialization-in-java-securit… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41110?
- CVE-2021-41110 is a critical-severity vulnerability in Commonwl Cwlviewer, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2021-10-01.
- How severe is CVE-2021-41110?
- Critical severity. CVSS v3 base score is 9.1 out of 10.