CVE coverage
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CVE-2023-51765
CVSS 5.3
6 detections found
sendmail through 8.17.2 allows SMTP smuggling in certain 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 sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. This is resolved in 8.18 and later versions with 'o' in srv_features.
Detection rules
| Source | Rule | Status | Updated |
|---|---|---|---|
| suricata | ET EXPLOIT Inbound Smuggling Message from SMTP Smuggling Tool M1 | rev 2 | 2024-01-31 |
| suricata | ET EXPLOIT Inbound Smuggling Message from SMTP Smuggling Tool M2 | rev 2 | 2024-01-31 |
| suricata | ET EXPLOIT Inbound Setup Message from SMTP Smuggling Tool | rev 1 | 2024-01-05 |
| snort | ET EXPLOIT Inbound Setup Message from SMTP Smuggling Tool | rev 1 | 2024-01-05 |
| snort | ET EXPLOIT Inbound Smuggling Message from SMTP Smuggling Tool M1 | rev 1 | 2024-01-05 |
| snort | ET EXPLOIT Inbound Smuggling Message from SMTP Smuggling Tool M2 | rev 1 | 2024-01-05 |