Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | < 4.96.1 |
Related Weaknesses (CWE)
References
- https://www.zerodayinitiative.com/advisories/ZDI-23-1470/Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00002.html
- https://www.zerodayinitiative.com/advisories/ZDI-23-1470/Third Party Advisory
FAQ
What is CVE-2023-42116?
CVE-2023-42116 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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. Authenticat...
How severe is CVE-2023-42116?
CVE-2023-42116 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2023-42116?
Check the references section above for vendor advisories and patch information. Affected products include: Exim Exim.