Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- CVSS 3.0 Base Score: 8.1
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade exim | Aug 22, 2024 | May 3, 2024 |
| Amazon_linux | — | Upgrade exim | May 13, 2025 | Oct 24, 2023 |
| Debian | — | Upgrade exim4 | Jul 30, 2024 | May 3, 2024 |
| Exim | — | Upgrade Exim to version 4.96.2 | Apr 7, 2026 | May 3, 2024 |
| Gentoo Linux | — | Upgrade mail-mta/exim. | Feb 19, 2024 | Feb 18, 2024 |
| Suse | — | Upgrade eximstats-htmlUpgrade eximonUpgrade exim | Oct 19, 2023 | Oct 18, 2023 |
| Ubuntu | — | Upgrade exim4-daemon-light (Ubuntu Pro)Upgrade exim4-daemon-heavyUpgrade exim4-daemon-lightUpgrade exim4-daemon-heavy (Ubuntu Pro) | Nov 2, 2023 | Oct 26, 2023 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub