cve/2019/CVE-2019-20633.md

CVE-2019-20633

Description

GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.

POC

Reference

• https://savannah.gnu.org/bugs/index.php?56683
• https://savannah.gnu.org/bugs/index.php?56683

Github

• https://github.com/strongcourage/uafbench
• https://github.com/strongcourage/uafuzz