CVE-2023-51766
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.
- Affected products
- Astra Linux, Exim, Linuxmint, Red Os, Ubuntu
- Exim
- < 4.97.1
- Fix
- Available
- CVSS 3.1
- 5.3 MEDIUM
- EPSS
- 1.1% (62th percentile)
- Weakness
- CWE-345
- NVD status
- Modified
- Published
- 2023-12-24
CVE-2023-51766 at NVD
No indexed exploits for CVE-2023-51766 yet
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No exploit for CVE-2023-51766 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.