Elastic high stable eql

Potential Privilege Escalation via CVE-2023-4911

This rule detects potential privilege escalation attempts through Looney Tunables (CVE-2023-4911). Looney Tunables is a buffer overflow vulnerability in GNU C Library's dynamic loader's processing of the GLIBC_TUNABLES environment variable.

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Detection Logic

sequence by host.id, process.parent.entity_id, process.executable with maxspan=5s
 [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and
  process.env_vars : "*GLIBC_TUNABLES=glibc.*=glibc.*=*"] with runs=5

Field Validations

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