CVE-2021-20314 describes a critical stack buffer overflow vulnerability in libspf2 versions prior to 1.2.11, impacting products like Fedora and Red Hat Enterprise Linux. This flaw allows an unauthenticated attacker to trigger a Denial of Service and potentially achieve remote code execution by sending specially crafted SPF explanation messages. With a CVSS score of 9.8 (Critical), the attack requires no user interaction and has high impacts on confidentiality, integrity, and availability. While no public exploits (Metasploit, Nuclei, ExploitDB) or active exploitation have been observed, and community discussion is minimal, the high FAUCET Risk Score of 77/100 indicates its significant potential danger.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2.11CPE matchmatch criteria | cpe:2.3:a:libspf2:libspf2:*:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
35CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
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.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.