Ubuntu update for exim4
| 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 Subscribe |
Ubuntu Operating systems & Components / Operating system eximon4 (Ubuntu package) Operating systems & Components / Operating system package or component exim4-base (Ubuntu package) Operating systems & Components / Operating system package or component exim4 (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
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
DescriptionThe 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.
Update the affected package exim4 to the latest version.
Vulnerable software versionsUbuntu: 16.04 - 24.04
eximon4 (Ubuntu package): before Ubuntu Pro
exim4-base (Ubuntu package): before Ubuntu Pro
exim4 (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6939-1
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.
