Integer overflow in Exim
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 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Exim
- Exim Libspf2 — versions exim 4.96-RC0-14-24b8ed847-XX
- Libspf2_project Libspf2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- zdi-disclosures@trendmicro.com (x_research-advisory, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
Frequently asked questions
- What is CVE-2023-42118?
- CVE-2023-42118 is a high-severity vulnerability in Exim, classified under Integer Underflow. CVSS score: 8.8/10. Published 2024-05-03.
- How severe is CVE-2023-42118?
- High severity. CVSS v3 base score is 8.8 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.