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IBM AIX: sendmail_advisory4 (CVE-2023-51765): Vulnerability in sendmail affects AIX

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IBM AIX: sendmail_advisory4 (CVE-2023-51765): Vulnerability in sendmail affects AIX

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
12/24/2023
Created
04/12/2024
Added
04/12/2024
Modified
04/19/2024

Description

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.

Solution(s)

  • ibm-aix-sendmail_advisory4

References

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