certfr_avis - certfr-2024-avi-0058

CERTFR-2024-AVI-0058

Vulnerability from certfr_avis

Une vulnérabilité a été découverte dans Postfix. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

D'après l'éditeur, les versions 3.8.5, 3.7.10, 3.6.14 et 3.5.24 apportent un correctif à long terme contrairement aux versions 3.8.4, 3.7.9, 3.6.13 et 3.5.23 qui constituaient une mesure de contournement.

Impacted products

	Vendor	Product	Description
	Postfix	Postfix	Postfix versions antérieures à 3.8.5, 3.7.10, 3.6.14 et 3.5.24

References

Title

Publication Time

CVE-2023-51764 (GCVE-0-2023-51764)

Vulnerability from cvelistv5

Published

2023-12-24 00:00

Modified

2024-08-02 22:48

Severity ?

CWE

Summary

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.

References

URL

Tags

	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	mailing-list
	http://www.openwall.com/lists/oss-security/2023/12/25/1	mailing-list
	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/	vendor-advisory
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/	vendor-advisory
	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	mailing-list
	http://www.openwall.com/lists/oss-security/2024/05/09/3	mailing-list

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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