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Gentoo GLSA: 202012-11 Low Severity c-ares Denial Of Service

gentoo
Calendar Grey December 23, 2020
Dist Gentoo Esm H88
A newly discovered Denial of Service vulnerability in c-ares for Gentoo systems poses risks. Users should update immediately to reduce attack potential. More details are provided.
A Denial of Service vulnerability was discovered in c-ares.

Summary

It was discovered that c-ares incorrectly handled certain DNS requests.

Topics%20covered

Topics Covered

security advisory denial of service gentoo DNS issue low severity dns attack c-ares

Resolution

All c-ares users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/c-ares-1.17.1"

References

[ 1 ] CVE-2020-8277 https://nvd.nist.gov/vuln/detail/CVE-2020-8277

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202012-11
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

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Severity: Low
Title: c-ares: Denial of service
Date: December 23, 2020
Bugs: #754939
ID: 202012-11

Topics%20covered

Topics Covered

security advisory denial of service gentoo DNS issue low severity dns attack c-ares

Synopsis

A Denial of Service vulnerability was discovered in c-ares.

Background

c-ares is an asynchronous resolver library.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/c-ares < 1.17.1 >= 1.17.1

Impact

===== A remote attacker, able to trigger a DNS request for a host of their choice by an application linked against c-ares, could possibly cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

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