CVE-2020-28019 is an Improper Initialization vulnerability affecting Exim versions prior to 4.94.2. This flaw arises from mishandling of certain getc functions when a client uses BDAT instead of DATA, potentially leading to recursion-based stack consumption. With a CVSS score of 7.5 (High), it is a network-exploitable vulnerability with low attack complexity, allowing unauthenticated attackers to cause high availability impact. While there is no evidence of active exploitation or publicly available exploit code in Metasploit, Nuclei, or ExploitDB, it has garnered some community discussion and media coverage, indicating awareness of its potential impact.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.88, < 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:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.