AXFR/IXFR response processing flaw in BIND in ISC BIND - CVE-2016-6170
Published: July 8, 2016 / Updated: January 21, 2021
Vulnerability details
The vulnerability allows a remote attacker to cause the target service to crash.
The vulnerability exists due to resource error in BIND. A remote primary DNS server can cause the target secondary DNS server to crash by sending a specially crafted AXFR response or IXFR response. A remote unauthenticated attacker may be able to send a specially crafted UPDATE message to cause the target server to crash.
Successful exploitation of this vulnerability may result in denial of service.
Affected software
SUSE Linux
Ubuntu
Fedora
Opensuse
bind9 (Ubuntu package)
lwresd (Ubuntu package)
bind99
Dell EMC Unisphere Central
How to mitigate CVE-2016-6170
Cybersecurity Help is currently unaware of any official solution, which resolves this vulnerability.
A third-party unofficial patch is available at: https://github.com/sischkg/xfer-limit.
lwresd (Ubuntu package) - update to Ubuntu Pro (Infra-only)
Dell EMC Unisphere Central - update to 4.0.7
bind99 - addressed in versions 9.9.9-4.P4.fc23, 9.9.9-4.P4.fc24, 9.9.9-4.P4.fc25