ZipSlip Arbitrary File Upload
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA onedev (theonedev) Fixed in 4.0.3
Timeline
- 2026-10-02 Threatist record created from CVE-2021-21251
References
More theonedev Onedev vulnerabilities
- TI-2021-04345 Pre-Auth Unsafe Deserialization on AttachmentUploadServet CVSS 3.1CRITICAL 10.0
- TI-2022-18585 CI/CD Docker Escape in OneDev CVSS 3.1CRITICAL 9.9
- TI-2022-18584 Access Control Bypass in Onedev CVSS 3.1CRITICAL 9.8
- TI-2021-04346 Pre-Auth Unsafe Deserialization on KubernetesResource CVSS 3.1CRITICAL 10.0
- TI-2022-18587 Git Repository Disclosure in Onedev CVSS 3.1HIGH 7.5
- TI-2021-04349 Pre-Auth Access token leak CVSS 3.1HIGH 8.6
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences