CVE-2023-51765

2023-12-2406:15:07

CWE-345

mitre

web.nvd.nist.gov

cve-2023-51765

sendmail

smtp smuggling

remote attackers

spf bypass

nvd

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

5.4

Confidence

High

EPSS

0.002

Percentile

54.6%

JSON

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.

Affected configurations

Nvd

Node

sendmailsendmailRange<8.18.0.2

Node

freebsdfreebsdRange<11.0

Node

redhatenterprise_linuxMatch8.0

redhatenterprise_linuxMatch9.0

VendorProductVersionCPE
sendmailsendmail*cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*
freebsdfreebsd*cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
redhatenterprise_linux8.0cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
redhatenterprise_linux9.0cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
sendmail	sendmail	*	cpe:2.3:a:sendmail:sendmail::::::::
freebsd	freebsd	*	cpe:2.3:o:freebsd:freebsd::::::::
redhat	enterprise_linux	8.0	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
redhat	enterprise_linux	9.0	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*