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Case File

CVE-2009-4022

LOW · CVSS 2.6 EPSS 7.95%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2009-11-25 · Last synced 2026-08-04

CyberRota Analysis

This is a low severity vulnerability with a CVSS score of 2.6. It may be remotely exploitable.

CVE
CVE-2009-4022
Severity
LOW
CVSS
2.6
EPSS
7.95%

Original NVD 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.