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.
History

Mon, 05 May 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-11-10T14:03:56.000Z

Updated: 2025-05-05T16:46:05.077Z

Reserved: 2021-11-08T00:00:00.000Z

Link: CVE-2021-43523

cve-icon Vulnrichment

Updated: 2024-08-04T03:55:29.258Z

cve-icon NVD

Status : Modified

Published: 2021-11-10T15:15:12.213

Modified: 2025-05-05T17:17:27.460

Link: CVE-2021-43523

cve-icon Redhat

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