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CVE-2021-43523

Published: 10 November 2021

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.

Priority

Medium

CVSS 3 base score: 9.6

Status

Package Release Status
uclibc
Launchpad, Ubuntu, Debian
trusty Ignored
(out of standard support)
upstream Needs triage

xenial Ignored
(out of standard support)
uclibc-ng
Launchpad, Ubuntu, Debian
trusty Ignored
(out of standard support)
upstream Needs triage

xenial Ignored
(out of standard support)