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PowerDNS Authoritative Server DoS Vulnerability (2022-01)

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

4.3

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

1 month ago

Modified

Modified

1 month ago

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Summary

PowerDNS Authoritative Server is prone to a denial of service (DoS) vulnerability.

Insight

Insight

IXFR usually exchanges only the modifications between two versions of a zone, but sometimes needs to fall back to a full transfer of the current version. When IXFR falls back to a full zone transfer, an attacker in position of man-in-the-middle can cause the transfer to be prematurely interrupted. This interrupted transfer is mistakenly interpreted as a complete transfer, causing an incomplete zone to be processed.

Affected Software

Affected Software

PowerDNS Authoritative version 4.4.2, 4.5.3 and 4.6.0.

Detection Method

Detection Method

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

Solution

Solution

Update to version 4.4.3, 4.5.4, 4.6.1 or later.

Common Vulnerabilities and Exposures (CVE)

References

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