Gentoo Websites Logo
Go to: Gentoo Home Documentation Forums Lists Bugs Planet Store Wiki Get Gentoo!

Bug 823806 (CVE-2021-43523)

Summary: sys-libs/uclibc-ng: Incorrect handling of special characters in DNS records (CVE-2021-43523)
Product: Gentoo Security Reporter: Sam James <sam>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Status: RESOLVED WONTFIX    
Severity: minor CC: blueness, embedded
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
URL: https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174
Whiteboard: B4 [noglsa]
Package list:
Runtime testing required: ---
Bug Depends on: 820905    
Bug Blocks:    

Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2021-11-15 08:13:00 UTC
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."
Comment 1 David Seifert gentoo-dev 2022-01-02 10:32:57 UTC
uclibc support in Gentoo has been removed.