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Potential CVE-2023-4911 - Looney Tunables

Anvilogic Forge

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Summary
This detection rule is designed to identify potential exploitation of the CVE-2023-4911 vulnerability, known as Looney Tunables, in Linux systems. This vulnerability arises from a buffer overflow in the GNU C Library's ld.so dynamic loader, which can be leveraged by local attackers to escalate privileges to root. The rule operates by monitoring specific environment variables associated with the vulnerability, specifically looking for the presence of `GLIBC_TUNABLES` or `glibc.malloc.mxfast` within endpoint data. By capturing this information, the detection logic aims to identify malicious attempts or configurations that suggest exploitation of the CVE. When such events are detected, they are tabulated with related metadata, including timestamps, host information, user details, source IPs, and associated processes to provide comprehensive alerting and response capabilities.
Categories
  • Linux
Data Sources
  • Process
  • Command
  • Logon Session
ATT&CK Techniques
  • T1068
Created: 2024-02-09