Description
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.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-3708-1 | exim4 security update |
Debian DSA |
DSA-5597-1 | exim4 security update |
Ubuntu USN |
USN-6611-1 | Exim vulnerability |
References
History
Tue, 04 Nov 2025 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Status: PUBLISHED
Assigner: mitre
Published:
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.
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Debian DSA
Ubuntu USN