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: 2009/11/25

Updated: 2019/03/06

Dependencies: 1003

Nessus ID: 42983

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.4

Temporal Score: 4.7

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

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

CVSS v3.0

Base Score: 6.4

Temporal Score: 5.5

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: 2009/11/24

Vulnerability Publication Date: 2009/11/24

Reference Information

CVE: CVE-2009-4022

BID: 37118