CVE-2020-28024 is a critical buffer underwrite vulnerability in Exim versions prior to 4.94.2. This flaw allows unauthenticated remote attackers to execute arbitrary commands due to incorrect handling of non-character error codes by the smtp_ungetc function. With a CVSS score of 9.8 (Critical), it presents a severe risk with network-based attacks, low complexity, and complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness of its potential impact.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.00, < 4.94.2CPE 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.