Alpine is a scaffolding library in Java. Alpine prior to version 1.10.4 allows Authentication Filter bypass. The AuthenticationFilter relies on the request URI to evaluate if the user is accessing the swagger endpoint. By accessing a URL with a path such as /api/foo;%2fapi%2fswagger the contains condition will hold and will return from the authentication filter without aborting the request. Note that the principal object will not be assigned and therefore the issue wont allow user impersonation. This issue has been fixed in version 1.10.4. There are no known workarounds.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses.
| Link | Tags |
|---|---|
| https://securitylab.github.com/advisories/GHSL-2021-1010-Alpine/ | third party advisory |
| https://github.com/stevespringett/Alpine/blob/f03dbda46229c26145a5f9f7f2660cc2c386be02/alpine/src/main/java/alpine/filters/AuthenticationFilter.java#L58-L60 | third party advisory patch |
| https://github.com/stevespringett/Alpine/releases/tag/alpine-parent-1.10.4 | third party advisory release notes |