جزئیات آسیب‌پذیری

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.

• https://github.com/networknt/light-4j/issues/2804 issue-tracking
• https://github.com/networknt/light-4j/pull/2805 patchissue-tracking
• https://github.com/networknt/light-4j/commit/54743badb34260b76ed131d8b6a4f60210cc3673 patch
• https://github.com/networknt/light-4j/releases/tag/2.4.0 release-notes
• https://github.com/networknt/light-4j/blob/2.3.7/basic-auth/src/main/java/com/networknt/basicauth/BasicAuthHandler.java#L189-L200 technical-description
• https://github.com/networknt/light-4j/blob/2.3.7/ldap-util/src/main/java/com/networknt/ldap/LdapUtil.java#L152-L173 technical-description
• https://www.vulncheck.com/advisories/networknt-light-4j-2.1.5-before-2.4.0-authentication-bypass-via-empty-ldap-password third-party-advisory