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  • Results Type: Overview
  • Keyword (text search): cpe:2.3:a:postfix:postfix:3.2.2:*:*:*:*:*:*:*
  • CPE Name Search: true
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Displaying matches 1 through 1.
Vuln ID Summary CVSS Severity
CVE-2023-51764

Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9.

Published: December 24, 2023; 12:15:08 AM -0500
V3.1: 5.3 MEDIUM
V2.0:(not available)