CVE-2023-51764
Luka w Postfix umożliwia atak SMTP smuggling, co pozwala na fałszowanie adresów e-mail.
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.
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 5.3 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 2.6% |
| Opublikowano (NVD) | 2023-12-24 05:15:08 UTC |
| Ostatnia modyfikacja (NVD) | 2026-10-08 21:17:49 UTC |
- http://www.openwall.com/lists/oss-security/2023/12/24/1 ([email protected]) [Mailing List, Third Party Advisory]
- http://www.openwall.com/lists/oss-security/2023/12/25/1 ([email protected]) [Mailing List, Third Party Advisory]
- http://www.openwall.com/lists/oss-security/2024/05/09/3 ([email protected])
- https://access.redhat.com/security/cve/CVE-2023-51764 ([email protected]) [Third Party Advisory]
- https://bugzilla.redhat.com/show_bug.cgi?id=2255563 ([email protected]) [Issue Tracking, Third Party Advisory]
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html ([email protected]) [Technical Description]
- https://github.com/duy-31/CVE-2023-51764 ([email protected]) [Exploit, Third Party Advisory]
- https://github.com/eeenvik1/CVE-2023-51764 ([email protected]) [Exploit, Third Party Advisory]
- https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html ([email protected])
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/ ([email protected])
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/ ([email protected])
- https://lwn.net/Articles/956533/ ([email protected])
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ ([email protected]) [Technical Description, Third Party Advisory]
- https://www.openwall.com/lists/oss-security/2024/01/22/1 ([email protected])
- https://www.postfix.org/announcements/postfix-3.8.5.html ([email protected])
- https://www.postfix.org/smtp-smuggling.html ([email protected]) [Exploit, Mitigation, Vendor Advisory]
- https://www.youtube.com/watch?v=V8KPV96g1To ([email protected]) [Exploit]
- https://lists.fedoraproject.org/archives/list/[email protected]/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/ (af854a3a-2127-422b-91ae-364da2661108)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/ (af854a3a-2127-422b-91ae-364da2661108)