[arch-security] [ASA-201509-3] powerdns: denial of service
rgacogne at archlinux.org
Mon Sep 7 15:37:59 UTC 2015
Arch Linux Security Advisory ASA-201509-3
Date : 2015-09-07
CVE-ID : CVE-2015-5230
Package : powerdns
Type : denial of service
Remote : Yes
Link : https://wiki.archlinux.org/index.php/CVE
The package powerdns before version 3.4.6-1 is vulnerable to a remote
denial of service.
Upgrade to 3.4.6-1.
# pacman -Syu "powerdns>=3.4.6-1"
The problem has been fixed upstream in version 3.4.6.
A complete denial of service may be prevented by running the server
inside a supervisor and setting distributor-threads to 1. The service
may still be degraded though.
A bug was found in the PowerDNS Authoritative Server DNS packet
parsing/generation code, which, when exploited, can cause individual
threads (disabling service) or whole processes (allowing a supervisor to
restart them) to crash with just one or a few query packets.
A remote attacker can cause a denial of service by sending specially
crafted DNS queries.
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