CVE-2023-51764

Katalog CVE

CVSS 5.3 · Medium EPSS 2,6%

Kerentanan Insufficient Verification of Data Authenticity pada postfix, fedoraproject fedora +1 lainnya. Skor CVSS 3.1 5.3 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

24 Desember 2023

Terakhir diubah

8 Oktober 2026

Status NVD

Modified

CVSS 3.1

5.3 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-345: Insufficient Verification of Data Authenticity

EPSS (30 hari)

2,6% peluang dieksploitasi; lebih tinggi dari 85,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.postfix.org/smtp-smuggling.html exploit · mitigasi · advisory vendor
• http://www.openwall.com/lists/oss-security/2023/12/24/1 mailing list · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2023/12/25/1 mailing list · advisory pihak ketiga
• https://access.redhat.com/security/cve/CVE-2023-51764 advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=2255563 issue tracking · advisory pihak ketiga
• https://github.com/duy-31/CVE-2023-51764 exploit · advisory pihak ketiga
• https://github.com/eeenvik1/CVE-2023-51764 exploit · advisory pihak ketiga
• https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ deskripsi teknis · advisory pihak ketiga
• https://www.youtube.com/watch?v=V8KPV96g1To exploit
• http://www.openwall.com/lists/oss-security/2024/05/09/3
• https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html deskripsi teknis
• https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N...
• https://lwn.net/Articles/956533/
• https://www.openwall.com/lists/oss-security/2024/01/22/1
• https://www.postfix.org/announcements/postfix-3.8.5.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH...
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRLF5SOS7TP5N7F...