[arch-security] [ASA-201706-18] bind: denial of service

[Remi Gacogne]

Arch Linux Security Advisory ASA-201706-18
==========================================

Severity: Medium
Date    : 2017-06-15
CVE-ID  : CVE-2017-3140
Package : bind
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-301

Summary
=======

The package bind before version 9.11.1.P1-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 9.11.1.P1-1.

# pacman -Syu "bind>=9.11.1.P1-1"

The problem has been fixed upstream in version 9.11.1.P1.

Workaround
==========

None.

Description
===========

A security issue has been found the Bind named DNS server < 9.11.1P1,
leading to a denial of service. A remote attacker can make a vulnerable
server configured to use a RPZ containing NSDNAME or NSIPpolicy rules
enter an endless loop, querying the same sets of authoritative servers
repeatedly, by sending a crafted query.

Impact
======

A remote attacker can cause a denial of service of a vulnerable server
using NSDNAME or NSIP RPZ policies by sending a crafted query.

References
==========

https://kb.isc.org/article/AA-01495
https://security.archlinux.org/CVE-2017-3140

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