Security Advisory

CVE-2021-43523

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2021-11-10 14:03:56

Last updated 2025-05-05 16:46:05

Assigner mitre

State PUBLISHED

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.

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