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Known Exploited Vulnerabilities CVE-2021-45046 Mappings

It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.

Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
CVE-2021-45046 Apache Log4j2 Deserialization of Untrusted Data Vulnerability secondary_impact T1486 Data Encrypted for Impact
Comments
CVE 2021-45046 is a Log4J-related vulnerability that has been seen to be used in cryptomining and ransomware operations.
References
  1. https://blog.cloudflare.com/protection-against-cve-2021-45046-the-additional-log4j-rce-vulnerability/
  2. https://therecord.media/local-governments-allegedly-targeted-with-iranian-drokbk-malware-through-log4j-vulnerability
  3. https://www.cisa.gov/news-events/cybersecurity-advisories/aa21-356a
CVE-2021-45046 Apache Log4j2 Deserialization of Untrusted Data Vulnerability primary_impact T1059 Command and Scripting Interpreter
Comments
CVE 2021-45046 is a Log4J-related vulnerability that could enable enables an attacker to cause Remote Code Execution or other effects in certain non-default configurations. This specific vulnerability has been reported to have been leveraged in cryptomining and ransomware operations.
References
  1. https://blog.cloudflare.com/protection-against-cve-2021-45046-the-additional-log4j-rce-vulnerability/
  2. https://therecord.media/local-governments-allegedly-targeted-with-iranian-drokbk-malware-through-log4j-vulnerability
  3. https://www.cisa.gov/news-events/cybersecurity-advisories/aa21-356a