Apache Log4j2 Remote Code Execution Vulnerability (CVE-2021-44228)
Severity: critical · Patch status: patched · Since 2021-12-10 · CVE-2021-44228
Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution. CISA added CVE-2021-44228 to its Known Exploited Vulnerabilities catalog on Dec 10, 2021, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
- US federal agencies must remediate by Dec 24, 2021 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
