CVE-2021-21249

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is an issue involving YAML parsing which can lead to post-auth remote code execution. In order to parse and process YAML files, OneDev uses SnakeYaml which by default (when not using `SafeConstructor`) allows the instantiation of arbitrary classes. We can leverage that to run arbitrary code by instantiating classes such as `javax.script.ScriptEngineManager` and using `URLClassLoader` to load the script engine provider, resulting in the instantiation of a user controlled class. For a full example refer to the referenced GHSA. This issue was addressed in 4.0.3 by only allowing certain known classes to be deserialized
Configurations

Configuration 1 (hide)

cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*

History

26 Apr 2022, 16:13

Type Values Removed Values Added
CWE CWE-74 CWE-502

21 Jan 2021, 14:28

Type Values Removed Values Added
References (MISC) https://github.com/theonedev/onedev/commit/d6fc4212b1ac1e9bbe3ce444e95f9af1e3ab8b66 - (MISC) https://github.com/theonedev/onedev/commit/d6fc4212b1ac1e9bbe3ce444e95f9af1e3ab8b66 - Patch, Third Party Advisory
References (CONFIRM) https://github.com/theonedev/onedev/security/advisories/GHSA-7xhq-m2q9-6hpm - (CONFIRM) https://github.com/theonedev/onedev/security/advisories/GHSA-7xhq-m2q9-6hpm - Third Party Advisory
CPE cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown
v2 : 6.5
v3 : 8.8

15 Jan 2021, 21:15

Type Values Removed Values Added
New CVE

Information

Published : 2021-01-15 21:15

Updated : 2023-12-10 13:41


NVD link : CVE-2021-21249

Mitre link : CVE-2021-21249

CVE.ORG link : CVE-2021-21249


JSON object : View

Products Affected

onedev_project

  • onedev
CWE
CWE-502

Deserialization of Untrusted Data

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')