GHSA-94g7-hpv8-h9qm Remote code injection in Log4j
Attackers can execute arbitrary code by logging untrusted data in vulnerable Log4j versions via the Splunk Java logging library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-94g7-hpv8-h9qm?
GHSA-94g7-hpv8-h9qm is a code injection vulnerability in com.splunk.logging:splunk-library-javalogging, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Impact
Logging untrusted or user controlled data with a vulnerable version of Log4J may result in Remote Code Execution (RCE) against your application. This includes untrusted data included in logged errors such as exception traces, authentication failures, and other unexpected vectors of user controlled input.
More Details: https://github.com/advisories/GHSA-jfh8-c2jp-5v3q
Patches
Version 1.11.1 of the Splunk Logging for Java library.
There is also a backport to version 1.6.2 released as a patch: 1.6.2-0-0.
Workarounds
If upgrading is not possible, then ensure the -Dlog4j2.formatMsgNoLookups=true system property is set on both client- and server-side components.
References
https://github.com/advisories/GHSA-jfh8-c2jp-5v3q
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/splunk/splunk-library-javalogging/issues
- Email us at [email protected]
Which versions are affected by GHSA-94g7-hpv8-h9qm?
4 open source packages ship an affected version, including com.splunk.logging:splunk-library-javalogging.
| Package | Affected | Fixed in |
|---|---|---|
com.splunk.logging:splunk-library-javalogging Maven | All versions | 1.6.2-0-0 |
com.splunk.logging:splunk-library-javalogging Maven | All versions | 1.6.2-0-0 |
com.splunk.logging:splunk-library-javalogging Maven | From 1.7.0 | 1.11.1 |
com.splunk.logging:splunk-library-javalogging Maven | From 1.7.0 | 1.11.1 |
How do I fix GHSA-94g7-hpv8-h9qm?
Upgrade com.splunk.logging:splunk-library-javalogging to a fixed version for your release line: 1.6.2-0-0 or 1.11.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is GHSA-94g7-hpv8-h9qm being exploited?
There is no known exploitation of GHSA-94g7-hpv8-h9qm in the wild and no public exploit code.