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.
Metrics
Affected Vendors & Products
References
History
Tue, 04 Nov 2025 19:30:00 +0000
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Status: PUBLISHED
Assigner: mitre
Published: 2023-12-24T00:00:00.000Z
Updated: 2025-11-04T18:21:35.998Z
Reserved: 2023-12-24T00:00:00.000Z
Link: CVE-2023-51766
No data.
Status : Modified
Published: 2023-12-24T06:15:07.673
Modified: 2025-11-04T19:16:21.973
Link: CVE-2023-51766
No data.