Detecting and responding to Dirty Pipe with Elastic

The Dirty Pipe vulnerability (CVE-2022-0847) is a Linux local privilege escalation flaw discovered by Max Kellermann that allows data overwriting in read-only files due to a flaw in the pipe buffer structure of the Linux kernel. This vulnerability, which exploits improperly initialized flag members in the pipe buffer structure, enables privilege escalation by permitting writes to the page cache behind read-only files. Due to its complexity, detecting this vulnerability is challenging, but the Elastic Security Research team has offered detailed guidance on identifying and responding to such exploitation attempts using Elastic Security products. Their research includes the use of Auditd for detection, potential countermeasures, and response strategies, helping organizations protect themselves despite the scarcity of information on detection. Elastic also provides resources such as Quick Start guides, free training courses, and trials of their security solutions to assist users in managing this threat.