CVE-2020-8794 is a critical remote code execution (RCE) vulnerability affecting OpenSMTPD versions prior to 6.6.4, including canonical, debian, and fedoraproject distributions. This flaw stems from an out-of-bounds read during multi-line replies, which can be triggered on the server side during bounce handling. With a CVSS score of 9.8 (CRITICAL) and an EPSS score indicating high exploitability, this vulnerability allows for complete compromise of confidentiality, integrity, and availability. While not on the KEV catalog, exploit modules exist in Metasploit and ExploitDB, and it has garnered significant community discussion and media coverage, indicating a high likelihood of exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.6.4CPE matchmatch criteria | cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:* | ||
18.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | ||
19.10CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* | ||
31CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | ||
32CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
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.