CVE-2023-51764
En bref
- Source
- NVD
- EPSS
- EPSS 2.63 % · centile 86 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- mitre
- Statut NVD
- Modified
Description
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.
Faiblesses (CWE)
- CWE-345 — Vérification insuffisante de l'authenticité des données
Références
- https://www.postfix.org/smtp-smuggling.html
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
- http://www.openwall.com/lists/oss-security/2023/12/24/1
- http://www.openwall.com/lists/oss-security/2023/12/25/1
- https://bugzilla.redhat.com/show_bug.cgi?id=2255563
- https://access.redhat.com/security/cve/CVE-2023-51764
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
- https://github.com/eeenvik1/CVE-2023-51764
- https://github.com/duy-31/CVE-2023-51764
- https://www.youtube.com/watch?v=V8KPV96g1To
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/
- 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.debian.org/debian-lts-announce/2024/01/msg00020.html
- http://www.openwall.com/lists/oss-security/2024/05/09/3
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2023-56453
- GCVE · GCVE-0-2023-51764
Avis du CERT-FR
- CERTFR-2025-AVI-0855 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0341 — Multiples vulnérabilités dans Synacor Zimbra Collaboration · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0058 — Vulnérabilité dans Postfix · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*< 3.5.23cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*≥ 3.6.0 < 3.6.13cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*≥ 3.7.0 < 3.7.9cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*≥ 3.8.0 < 3.8.4cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Produits affectés
| Produit | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |