Vulnerability in networknt light-4j

[ Description ]Official description

Networknt light-4j from 2.1.5 before 2.4.0 contains an authentication bypass vulnerability in BasicAuthHandler that allows unauthenticated attackers to log in as LDAP/AD-delegated users. Attackers can send a Basic Authorization header with a known username and empty password, triggering an unauthenticated LDAP bind that is accepted as successful authentication.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicau…
• github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/Lda…
• github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673
• github.com/networknt/light-4j/issues/2804
• github.com/networknt/light-4j/pull/2805
• github.com/networknt/light-4j/releases/tag/2.4.0
• www.vulncheck.com/advisories/networknt-light-4j-2.1.5-before-2.4.0-authentication-bypas…