CVE-2021-21247
This listener decodes and deserializes the `data` query parameter.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.50% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74, CWE-502
- Affected
- onedev project/onedev
- Source
- security-advisories@github.com
References
- https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjpThird Party Advisory
- https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjpThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.