Description

In Spring Security, versions 5.7.x prior to 5.7.12, 5.8.x prior to 5.8.11, versions 6.0.x prior to 6.0.9, versions 6.1.x prior to 6.1.8, versions 6.2.x prior to 6.2.3, an application is possible vulnerable to broken access control when it directly uses the AuthenticatedVoter#vote passing a null Authentication parameter.

Specifically, an application is vulnerable if:

• The application uses AuthenticatedVoter directly and a null authentication parameter is passed to it resulting in an erroneous true return value.

An application is not vulnerable if any of the following is true:

• The application does not use AuthenticatedVoter#vote directly.
• The application does not pass null to AuthenticatedVoter#vote.

Note that AuthenticatedVoter is deprecated since 5.8, use implementations of AuthorizationManager as a replacement.

Affected Spring Products and Versions

Spring Security

• 6.2.0 to 6.2.2
• 6.1.0 to 6.1.7
• 6.0.0 to 6.0.9
• 5.8.0 to 5.8.10
• 5.7.0 to 5.7.11
• Older, unsupported versions are also affected

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.

Credit

The issue was identified and responsibly reported by pwnull (https://github.com/pwnull).