CVE-2009-4022
bind9 - cache poisoning
EPSS 21.6%
Description
Unspecified vulnerability in ISC BIND 9.0.x through 9.3.x, 9.4 before 9.4.3-P4, 9.5 before 9.5.2-P1, 9.6 before 9.6.1-P2, and 9.7 beta before 9.7.0b3, with DNSSEC validation enabled and checking disabled (CD), allows remote attackers to conduct DNS cache poisoning attacks by receiving a recursive client query and sending a response that contains an Additional section with crafted data, which is not properly handled when the response is processed "at the same time as requesting DNSSEC records (DO)," aka Bug 20438.
How to fix CVE-2009-4022
To remediate CVE-2009-4022, upgrade the affected package to a fixed version below.
- —upgrade to 1:9.6.1.dfsg.P2-1 or later
- —upgrade to 1:9.3.4-2etch6 or later
Is CVE-2009-4022 being exploited?
Moderate — EPSS is 21.6%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 1:9.6.1.dfsg.P2-1
- from 0, < 1:9.3.4-2etch6