What is CVE-2023-42116?

CVE-2023-42116 is a high-severity vulnerability in Exim, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2024-05-03.

How severe is CVE-2023-42116?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2023-42116 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Exim

CVE-2023-42116

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 vul…

Vulnerability class: Buffer Overflow

EPSS: 0.067 (91.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Exim — versions exim 4.95

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

Public proof-of-concept exploits

References

ZDI-23-1470 (x_research-advisory)

Frequently asked questions

What is CVE-2023-42116?: CVE-2023-42116 is a high-severity vulnerability in Exim, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2024-05-03.
How severe is CVE-2023-42116?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2023-42116 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.