Deserialization in Onedev Project
CVE-2021-21247
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, the application's BasePage registers an AJAX event listener (`AbstractPostAjaxBehavior`) in all pages other than the login page. This listener decodes and deserializes the `data` query parameter. We can access this listener by submitting a POST request to any page. This issue may lead to `post-auth RCE` This endpoint is subject to authentication and, therefore, requires a valid user to carry on the attack. This issue was addressed in 4.0.3 by encrypting serialization payload with secrets only known to server.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.015 (74.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
Affected products
- Onedev Project
- Theonedev Onedev — versions < 4.0.3
Weakness classification (CWE)
References
- github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjp (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21247?
- CVE-2021-21247 is a critical-severity vulnerability in Onedev Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.6/10. Published 2021-01-15.
- How severe is CVE-2021-21247?
- Critical severity. CVSS v3 base score is 9.6 out of 10.