CVE-2021-33912 is a critical heap-based buffer overflow vulnerability in libspf2 versions prior to 1.2.11, affecting Debian and other systems utilizing this library for SPF record processing. This flaw, stemming from incorrect sprintf usage, could allow unauthenticated remote attackers to execute arbitrary code via a crafted SPF DNS record. With a CVSS score of 9.8 (CRITICAL), it presents a high risk of complete compromise (confidentiality, integrity, availability) with low attack complexity and no user interaction required. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2.11CPE matchmatch criteria | cpe:2.3:a:libspf2_project:libspf2:*:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
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.
Remediation records are not available for this CVE.