CVEs-PoC/2019/CVE-2019-9021.md

CVE-2019-9021

Description

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A heap-based buffer over-read in PHAR reading functions in the PHAR extension may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse the file name, a different vulnerability than CVE-2018-20783. This is related to phar_detect_phar_fname_ext in ext/phar/phar.c.

POC

Reference

• https://bugs.php.net/bug.php?id=77247
• https://hackerone.com/reports/475499
• https://usn.ubuntu.com/3902-1/

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/syadg123/pigat
• https://github.com/teamssix/pigat