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CVE-2021-21250

7.7 · HIGH

OneDev is an all-in-one devops platform.

Published Jan 15, 2021CWE-538EPSS 0.94%

Overview

CVE-2021-21250 is a high-severity vulnerability. It was published on January 15, 2021 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which may lead to arbitrary file read. When BuildSpec is provided in XML format, the spec is processed by XmlBuildSpecMigrator.migrate(buildSpecString); which processes the XML document without preventing the expansion of external entities. These entities can be configured to read arbitrary files from the file system and dump their contents in the final XML document to be migrated. If the files are dumped in properties included in the YAML file, it will be possible for an attacker to read them. If not, it is possible for an attacker to exfiltrate the contents of these files Out Of Band. This issue was addressed in 4.0.3 by ignoring ENTITY instructions in xml file.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770fGitHubgithub.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2rGitHubgithub.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770fGitHubgithub.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r

How CyberStrike helps

Frequently asked questions

What is CVE-2021-21250?

CVE-2021-21250 is a high-severity vulnerability. It was published on January 15, 2021 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2021-21250?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-21250?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-21250?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-21250 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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