CVE-2023-42119: exim Out-of-bounds Read
Vulnerability summary
CVE-2023-42119 is a low (CVSS 3.1) Out-of-bounds Read vulnerability in exim. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 5Timeline
- 03-05-2024PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
Description
Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated3.1LowCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated3.1LowCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVDNIST3.1LowCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
1.61%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
0.00 pp
From 1.61% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- exim4< 4.96-15+deb12u3 | < 4.97~RC2-2
Exim1 product
- eximexim 4.96-RC0-14-24b8ed847-XX | < 4.96.2
Ubuntu1 product
- exim4< 4.82-3ubuntu2.4+esm7 | < 4.86.2-2ubuntu2.6+esm5 | < 4.90.1-1ubuntu1.10+esm2 | < 4.93-13ubuntu1.9 | < 4.95-4ubuntu2.4
3 vendors · 3 products
