CVE-2023-42116
Description
Exim SMTP Challenge Stack-based Buffer Overflow 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 handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17515.
How to fix CVE-2023-42116
To remediate CVE-2023-42116, upgrade the affected package to a fixed version below.
- —upgrade to 4.94.2-7+deb11u1 or later
Is CVE-2023-42116 being exploited?
Moderate — EPSS is 6.7%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 4.94.2-7+deb11u1
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 |