ISC BIND 9 DNSSEC Query Response Remote Cache Poisoning

medium Nessus Network Monitor Plugin ID 5243


The remote DNS Server is vulnerable to a remote cache-poisoning attack.


The remote DNS Server is running BIND 9 earlier than 9.4.3-P4, 9.5.2-P1, or 9.6.1-P2. Such versions may incorrectly ad records to its cache from the additional section of responses received during resolution of a recursive client query. This behavior only occurs when processing client queries with checking disabled (CD) at the same time as requesting DNSSEC records (DO).


Upgrade to BIND 9.4.3-P4 / 9.5.2-P1 / 9.6.1-P2 or later.

See Also

Plugin Details

Severity: Medium

ID: 5243

Family: DNS Servers

Published: 11/25/2009

Updated: 3/6/2019

Nessus ID: 42983

Risk Information


Risk Factor: Low

Score: 3.4


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Patch Publication Date: 11/24/2009

Vulnerability Publication Date: 11/24/2009

Reference Information

CVE: CVE-2009-4022

BID: 37118