exim4 vulnerability

2024-07-3118:40:26

Google

osv.dev

exim4

vulnerability

misparsing

mime

filenames

remote attacker

bypass

protection

executable attachments

end users

software

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

6.9

Confidence

Low

JSON

Phillip Szelat discovered that Exim misparses multiline MIME header
filenames. A remote attacker could use this issue to bypass a MIME filename
extension-blocking protection mechanism and possibly deliver executable
attachments to the mailboxes of end users.