Protection Mechanism Failure in Postfix - CVE-2005-0337
Published: June 8, 2025
Vulnerability identifier: #VU110626
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2005-0337
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures. When /proc/net/if_inet6 is not available and permit_mx_backup is enabled in smtpd_recipient_restrictions, allows remote attackers to bypass e-mail restrictions and perform mail relaying by sending mail to an IPv6 hostname.
Affected software
Postfix
How to mitigate CVE-2005-0337
Install updates from vendor's website.
Postfix - update to 2.1.4
External References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267837
- http://marc.info/?l=bugtraq&m=110763358832637&w=2
- http://secunia.com/advisories/14137/
- http://www.redhat.com/support/errata/RHSA-2005-152.html
- http://www.securityfocus.com/bid/12445
- https://exchange.xforce.ibmcloud.com/vulnerabilities/19218
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11339