CWE
79
Advisory Published
Updated

CVE-2021-43523: XSS

First published: Wed Nov 10 2021(Updated: )

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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Uclibc Uclibc<=0.9.33.2
Uclibc-ng Project Uclibc-ng<1.0.39
<=0.9.33.2
<1.0.39

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