cve/2020/CVE-2020-28025.md

CVE-2020-28025

Description

Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkim_finish_bodyhash does not validate the relationship between sig->bodyhash.len and b->bh.len; thus, a crafted DKIM-Signature header might lead to a leak of sensitive information from process memory.

POC

Reference

• https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28025-BHASH.txt
• https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28025-BHASH.txt

Github

• https://github.com/ARPSyndicate/cvemon