CVE-2021-43523 is a critical vulnerability in uClibc and uClibc-ng versions prior to 1.0.39, stemming from improper handling of special characters in DNS responses. This flaw can lead to domain hijacking, remote code execution, XSS, or application crashes due to incorrect hostname output or injection into applications. With a CVSS score of 9.6 (Critical), it presents a significant risk, requiring user interaction and impacting confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the potential impact remains severe.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 0.9.33.2CPE matchmatch criteria | cpe:2.3:a:uclibc:uclibc:*:*:*:*:*:*:*:* | ||
< 1.0.39CPE matchmatch criteria | cpe:2.3:a:uclibc-ng_project:uclibc-ng:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 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 0.1 Security Researcher mentions.