cve/2021/CVE-2021-4209.md

CVE-2021-4209

Description

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

POC

Reference

• 3db3527344

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/GitHubForSnap/ssmtp-gael