Re: Clarification on

2021-12-21 Thread David Smiley
Thanks so much for responding to me Ralph! (and promptly) I think this is really useful information that you shared that would be a relief to many users. Users that only use Log4j2 via Slf4j are mitigated by this technique. That's a big deal! Most other users using Log4j2 directly would as wel

Re: Clarification on

2021-12-21 Thread Ralph Goers
The system property blocked lookups from being processed in what I would call “normal” logging - those using the style logger.info(“Hello {}”, name). However, if you made a call like logger.printf(“Hello %s”, name) lookups would not be blocked. If you obtained your logger with a special Logger

Clarification on

2021-12-21 Thread David Smiley
Hello, I'm on the Apache Solr PMC, and I'm trying to do some due diligence on understanding the extent to which "log4j2.formatMsgNoLookups" may or may not be effective in mitigating certain vulnerabilities *for Solr*. Solr recently upgraded to Log4j 2.16 but I want to validate the extent to which