DSA-1852 fetchmail -- insufficient input validationID: oval:org.mitre.oval:def:8299 | Date: (C)2009-12-15 (M)2021-09-30 |
Class: PATCH | Family: unix |
It was discovered that fetchmail, a full-featured remote mail retrieval and forwarding utility, is vulnerable to the "Null Prefix Attacks Against SSL/TLS Certificates" recently published at the Blackhat conference. This allows an attacker to perform undetected man-in-the-middle attacks via a crafted ITU-T X.509 certificate with an injected null byte in the subjectAltName or Common Name fields. Note, as a fetchmail user you should always use strict certificate validation through either these option combinations: sslcertck ssl sslproto ssl3 (for service on SSL-wrapped ports) or sslcertck sslproto tls1 (for STARTTLS-based services)
Platform: |
Debian 5.0 |
Debian 4.0 |