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CVE-2021-43523

nvd nist
Published: Nov 10, 2021Modified: May 5, 2025

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9.6
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Exploitability: 2.8 / Impact: 6.0
Source: NVD

Description

In uClibc and uClibc-ng before 1.0.39, incorrect handling of special characters in domain names returned by DNS servers via gethostbyname, getaddrinfo, gethostbyaddr, and getnameinfo can lead to output of wrong hostnames (leading to domain hijacking) or injection into applications (leading to remote code execution, XSS, applications crashes, etc.). In other words, a validation step, which is expected in any stub resolver, does not occur.

Affected (2)

Uclibc
1 product
Uclibc
Uclibc Ng Project
1 product
Uclibc Ng
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Uclibc
Up to 0.9.33.2
Uclibc Ng
Before 1.0.39

Related CWEs

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (6)

Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
Vendor Advisory
Source: cve@mitre.org
ExploitMailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitMailing ListThird Party Advisory

Timeline

No history available yet.