Potential Privilege Escalation via CVE-2023-4911

Last updated a year ago on 2025-02-04

Created 2 years ago on 2023-10-05

About

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.

Tags

Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: Privilege EscalationUse Case: VulnerabilityData Source: Elastic DefendLanguage: eql

Severity

high

Risk Score

MITRE ATT&CK™

Privilege Escalation (TA0004)(external, opens in a new tab or window)

↳ Exploitation for Privilege Escalation (T1068)(external, opens in a new tab or window)

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type: Event Correlation Rule
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: logs-endpoint.events.process*
Related Integrations: endpoint(external, opens in a new tab or window)
Query

✄𐘗text code block:
✄𐘗sequence 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

Install detection rules in Elastic Security

Detect Potential Privilege Escalation via CVE-2023-4911 in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).