CVE-2005-0337

NONECVSS 0.0

0.0

Postfix 2.1.3, 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.

CVSS v3: —
EG Score: —
EPSS: 75.1%
KEV: Not listed

Published

May 2, 2005

Last Modified

April 16, 2026

References (14)

cve@mitrehttp://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267837
cve@mitrehttp://marc.info/?l=bugtraq&m=110763358832637&w=2
cve@mitrehttp://secunia.com/advisories/14137/
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2005-152.html
cve@mitrehttp://www.securityfocus.com/bid/12445
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/19218
cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11339
af854a3a-2127-422b-91ae-364da2661108http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267837
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=110763358832637&w=2
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/14137/
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/RHSA-2005-152.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/12445
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/19218
af854a3a-2127-422b-91ae-364da2661108https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11339

Data Freshness Timeline

(refreshed 12× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
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2026-05-27 13:37 UTCepss_batch
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2026-05-26 07:16 UTCepss_batch
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2026-05-23 00:07 UTCOSV refresh
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
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2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Frequently asked(4)

What is CVE-2005-0337?

CVE-2005-0337 is a none vulnerability published on May 2, 2005. Postfix 2.1.3, when /proc/net/ifinet6 is not available and permitmxbackup is enabled in smtpdrecipient_restrictions, allows remote attackers to bypass e-mail restrictions and perform mail relaying by sending mail to an IPv6 hostname.

When was CVE-2005-0337 disclosed?

CVE-2005-0337 was first published in the National Vulnerability Database on May 2, 2005, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2005-0337 actively exploited?

CVE-2005-0337 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2005-0337?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2005-0337, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2005-0337

📅 Published

🔄 Last Modified

🔗 References (14)