CVE-2020-28017 is a critical integer overflow vulnerability affecting Exim mail servers prior to version 4.94.2. This flaw allows a remote attacker to trigger a buffer overflow by sending an email with an exceptionally large number of recipients, potentially leading to arbitrary code execution. With a CVSS score of 9.8, it presents a severe risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability. While remote exploitation might be challenging due to resource consumption, there is no public exploit code available, and it is not listed in CISA's KEV catalog. Despite this, the vulnerability has garnered significant community discussion and media coverage, indicating awareness of its potential impact.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.94.1CPE matchmatch criteria | cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.