Debian update for exim4



Published: 2024-07-11 | Updated: 2024-08-02
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-39929
CWE-ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Operating systems & Components / Operating system

exim4 (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU94107

Risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2024-39929

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of RFC 2231 header filename. A remote attacker can bypass a $mime_filename extension-blocking protection mechanism and deliver malicious executable files to the mailboxes.

Mitigation

Update exim4 package to one of the following versions: 4.94.2-7+deb11u3, 4.96-15+deb12u5.

Vulnerable software versions

Debian Linux: All versions

exim4 (Debian package): before 4.96-15+deb12u5

CPE2.3 External links

http://lists.debian.org/debian-security-announce/2024/msg00139.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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