Cross-site Scripting (XSS) Affecting uclibc package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.84% (82nd percentile)

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  • Snyk IDSNYK-DEBIAN11-UCLIBC-1914023
  • published11 Nov 2021
  • disclosed10 Nov 2021

Introduced: 10 Nov 2021

CVE-2021-43523  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

There is no fixed version for Debian:11 uclibc.

NVD Description

Note: Versions mentioned in the description apply only to the upstream uclibc package and not the uclibc package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

CVSS Scores

version 3.1