CVE-2009-4022

Bind vulnerability

CVSS

2.6

EPSS

8.0%

EPSS pct

94th

Exploited

No known

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.

Affected vendor

Isc

Affected product

Bind

CVSS vector

AV:N/AC:H/Au:N/C:N/I:P/A:N

Published

2009-11-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no authentication. Successful exploitation leads to partial impact to integrity.

Its EPSS score of 8.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2009-4022

Confirm whether Isc Bind is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-4022.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-4022

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