PT-2021-23096 · Cwlviewer · Cwlviewer

Zhenfeng · Published 2021-10-01 · Updated 2021-10-08 · CVE-2021-41110

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions cwlviewer versions prior to 1.3.1

Description cwlviewer is a web application to view and share Common Workflow Language workflows. It contains a Deserialization of Untrusted Data issue. 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.

Recommendations For versions prior to 1.3.1, install the patch from commit number f6066f09edb70033a2ce80200e9fa9e70a5c29de, dated 2021-09-30, which contains the fix for the issue by creating the object with a SafeConstructor object.

Exploit

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2021-41110

GHSA-7G7J-F5G3-FQP7

Affected Products

Cwlviewer

References · 8

• 🔥 https://fatalerrors.org/a/analysis-of-the-snakeyaml-deserialization-in-java-security.html · Exploit
• https://github.com/common-workflow-language/cwlviewer/commit/f6066f09edb70033a2ce80200e9fa9e70a5c29de · Patch
• https://github.com/common-workflow-language/cwlviewer/security/advisories/GHSA-7g7j-f5g3-fqp7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-41110 · Security Note
• https://osv.dev/vulnerability/CVE-2021-41110 · Vendor Advisory
• https://t.me/cvenotify/21731 · Telegram Post
• https://t.me/cibsecurity/29791 · Telegram Post
• https://t.me/cvenotify/21745 · Telegram Post