Vulnerability · Published Jan 15, 2021 · Assigned by GitHub_M
CVE-2021-21251ZipSlip Arbitrary File Upload
High 7.7
In plain English
A high-severity path traversal in onedev from theonedev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 12.7% (higher than 96% of all known vulnerabilities).
Official description
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3 there is a critical "zip slip" vulnerability. This issue may lead to arbitrary file write. The KubernetesResource REST endpoint untars user controlled data from the request body using TarUtils. TarUtils is a custom library method leveraging Apache Commons Compress. During the untar process, there are no checks in place to prevent an untarred file from traversing the file system and overriding an existing file. For a successful exploitation, the attacker requires a valid __JobToken__ which may not be possible to get without using any of the other reported vulnerabilities. But this should be considered a vulnerability in `io.onedev.commons.utils.TarUtils` since it lives in a different artifact and can affect other projects using it. This issue was addressed in 4.0.3 by validating paths in tar archive to only allow them to be in specified folder when extracted.
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
References
- https://github.com/theonedev/onedev/security/advisories/GHSA-2w6j-wc8c-9mq2 x_refsource_CONFIRM