Security context
Low· 3.7GHSA-vwqq-5vrc-xw9h CVE-2020-9488CWE-295Published Jun 5, 2020

Improper validation of certificate with host mismatch in Apache Log4j SMTP appender

Research this vulnerability

Research is free — Hunters explains how the bug works, the root-cause code pattern, how the fix addresses it, and how to test whether a target is affected, in chat. Investigate & write exploit is a paid run — the engine reads the advisory and fix commits, then builds and validates a working proof-of-concept exploit with reproduction steps.

Affected versions

2.13.0 → fixed in 2.13.22.4.0 → fixed in 2.12.30 → fixed in 2.3.2

Details

Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.

The fix

No fix commit could be resolved for this advisory (it may reference an issue tracker or a non-GitHub patch). See the references below.

References