CVE-2020-28013 describes a Heap-based Buffer Overflow vulnerability in Exim versions prior to 4.94.2. This flaw arises from mishandling specific command-line arguments, specifically "-F '.('", due to incorrect interpretation of negative sizes in strncpy. With a CVSS score of 7.8 (HIGH), this vulnerability could allow a local attacker to escalate privileges from any user to root, leading to high impact on confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) is currently available and it's not listed in CISA's KEV catalog, the vulnerability has garnered significant community attention and media coverage, indicating its potential for exploitation.
| 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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.