CVE-2023-42117
Description
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.
How to fix CVE-2023-42117
To remediate CVE-2023-42117, upgrade the affected package to a fixed version below.
- —upgrade to 4.94.2-7+deb11u4 or later
Is CVE-2023-42117 being exploited?
Moderate — EPSS is 7.3%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 4.94.2-7+deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |