CVE-2023-51765

sendmail through 8.17.2 allows SMTP smuggling in certain configurations

published December 24, 2023

CVSS
—
EPSS
1%
Percentile
64.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01082 · 64.9th percentile
Published
2023-12-24T00:00Z
EPSS history
Timeline
  • 24 DEC 00:00Z
    sendmail through 8.17.2 allows SMTP smuggling in certain configurations
    cvelistv5