ISC BIND 9.7.1-9.7.2-P3 IXFR / DDNS Update Combined with High Query Rate DoS
high Nessus Plugin ID 52158
Language:
New! Vulnerability Priority Rating (VPR)
Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it is different from CVSS.
VPR Score: 3.6
Synopsis
The remote name server is affected by a denial of service vulnerability.Description
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.
Solution
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: 2/23/2011
Updated: 6/27/2018
Dependencies: bind_version.nasl
Configuration: Enable paranoid mode
Risk Information
Risk Factor: High
VPR Score: 3.6
CVSS v2.0
Base Score: 7.1
Temporal Score: 5.3
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C
Temporal Vector: E:U/RL:OF/RC:C
Vulnerability Information
CPE: cpe:/a:isc:bind
Required KB Items: bind/version, Settings/ParanoidReport
Exploit Ease: No known exploits are available
Patch Publication Date: 2/15/2011
Vulnerability Publication Date: 2/22/2011
Reference Information
CVE: CVE-2011-0414
BID: 46491