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PowerDNS Recursor < 4.1.18, 4.2.0 < 4.2.4, 4.3.0 < 4.3.4 DoS Vulnerability

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

1 year ago

Modified

Modified

1 year ago

Summary

PowerDNS Recursor is prone to a denial of service vulnerability.

Insight

Insight

An issue has been found in PowerDNS Recursor where a remote attacker can cause the cached records for a given name to be updated to the 'Bogus' DNSSEC validation state, instead of their actual DNSSEC 'Secure' state, via a DNS ANY query. This results in a denial of service for installations that always validate (dnssec=validate) and for clients requesting validation when on-demand validation is enabled (dnssec=process).

Affected Software

Affected Software

PowerDNS Recursor version 4.1.17 and prior, 4.2.0 - 4.2.4 and 4.3.0 - 4.3.4.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 4.1.18, 4.2.5, 4.3.5 or later.

Common Vulnerabilities and Exposures (CVE)