UpHeron
All vulnerabilities

Servers and applications

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…

Severity
Medium 5.3
Published
24 Dec 2023
Last changed
8 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.5.23, 3.6.13, 3.7.9, 3.8.4
Sources
NVD

Affected software

SoftwareAffected versions
PostfixServers and applications · cpe:a:postfix:postfix
  • Every version before 3.5.23
  • From 3.6.0 before 3.6.13
  • From 3.7.0 before 3.7.9
  • From 3.8.0 before 3.8.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-51764
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-51764