CVE-2023-51766

Katalog CVE

CVSS 5.3 · Medium EPSS 1,1%

Kerentanan Insufficient Verification of Data Authenticity pada exim, fedoraproject extra packages for enterprise linux +2 lainnya. Skor CVSS 3.1 5.3 (Medium) menurut NVD.

Deskripsi (NVD)

Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. 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 Exim supports <LF>.<CR><LF> but some other popular e-mail servers do not.

Rincian

Terbit di NVD

24 Desember 2023

Terakhir diubah

17 Juni 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)

1,1% peluang dieksploitasi; lebih tinggi dari 64,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugs.exim.org/show_bug.cgi?id=3063 issue tracking · advisory vendor
• https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766 mitigasi · advisory vendor
• https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca patch
• https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 patch
• http://www.openwall.com/lists/oss-security/2023/12/29/2 mailing list · mitigasi · advisory pihak ketiga
• 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
• http://www.openwall.com/lists/oss-security/2024/01/01/1 mailing list · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2024/01/01/2 mailing list · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2024/01/01/3 mailing list · advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=2255852 issue tracking · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html mailing list · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKU... mailing list · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCX... mailing list · advisory pihak ketiga
• https://lwn.net/Articles/956533/ advisory pihak ketiga
• https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ deskripsi teknis · advisory pihak ketiga
• https://www.openwall.com/lists/oss-security/2023/12/23/2 issue tracking · mailing list · advisory pihak ketiga
• https://www.youtube.com/watch?v=V8KPV96g1To exploit
• https://exim.org/static/doc/security/CVE-2023-51766.txt broken link
• https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html deskripsi teknis
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORN7OKEQPPBKUHY...
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QPDWHJPABVJCXDS...