ISC BIND 9.7.1-9.7.2-P3 IXFR / DDNS Update Combined with High Query Rate DoS

High Nessus Plugin ID 52158


The remote name server is affected by a denial of service vulnerability.


According to its self-reported version number, the remote installation of BIND is affected by a denial of service vulnerability.

There is a small window of time after an authoritative server processes a successful IXFR transfer or a dynamic update during which the IXFR / update coupled with a query may cause a deadlock to occur.
A server experiencing a high query and/or update rate will have a higher chance of being deadlocked.


Upgrade to BIND 9.7.3 or later.

A possible workaround is to restrict BIND to a single worker thread, using the '-n1' flag for example.

See Also

Plugin Details

Severity: High

ID: 52158

File Name: bind9_973.nasl

Version: 1.10

Type: remote

Family: DNS

Published: 2011/02/23

Modified: 2018/06/27

Dependencies: 10028

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Required KB Items: bind/version, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2011/02/15

Vulnerability Publication Date: 2011/02/22

Reference Information

CVE: CVE-2011-0414

BID: 46491

CERT: 559980

Secunia: 43443