CVEs-PoC/2018/CVE-2018-19974.md

CVE-2018-19974

Description

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

POC

Reference

• https://bnbdr.github.io/posts/extracheese/
• https://github.com/VirusTotal/yara/issues/999
• https://github.com/bnbdr/swisscheese/

Github

• https://github.com/bnbdr/swisscheese