What is CVE-2023-42118?

CVE-2023-42118 is a high-severity vulnerability in Exim Libspf2, classified under Integer Underflow. CVSS score: 7.5/10. Published 2024-05-03.

How severe is CVE-2023-42118?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-42118 known to be exploited?

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

Integer overflow in Exim Libspf2

CVE-2023-42118

Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vu…

EPSS: 0.515 (98.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Exim Libspf2 — versions exim 4.96-RC0-14-24b8ed847-XX

Weakness classification (CWE)

CWE-191 — Integer Underflow

Public proof-of-concept exploits

References

ZDI-23-1472 (x_research-advisory)

Frequently asked questions

What is CVE-2023-42118?: CVE-2023-42118 is a high-severity vulnerability in Exim Libspf2, classified under Integer Underflow. CVSS score: 7.5/10. Published 2024-05-03.
How severe is CVE-2023-42118?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-42118 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.