// #postfix
2 articles
GNU SASL CVE-2026-48829: DIGEST-MD5 Parser Crash Affects Enterprise Mail Servers and LDAP Stacks
A NULL pointer dereference in GNU SASL's DIGEST-MD5 authentication mechanism (CVE-2026-48829, CVSS 7.5) allows a remote attacker to crash any service using GNU SASL for DIGEST-MD5 authentication by sending a malformed authentication token. Debian and other distribution security advisories published 24 May. Services affected include Postfix, Cyrus IMAP, and LDAP servers using SASL for authentication.
SASL Authentication Security in Enterprise Mail Servers: Deprecating DIGEST-MD5 and Hardening SMTP AUTH
The GNU SASL CVE-2026-48829 DIGEST-MD5 crash is a reminder that legacy authentication mechanisms in enterprise mail infrastructure carry risk that is often invisible to security teams. A structured review of SASL mechanism configuration in Postfix, Dovecot, and Exchange environments can eliminate entire vulnerability classes while improving authentication security.