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Unbound DNS Resolver Denial of Service 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:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

4 years ago

Share

Summary

A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.

Affected Software

Affected Software

Unbound DNS Resolver before version 1.6.8

Detection Method

Detection Method

The script checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 1.6.8 or above

Common Vulnerabilities and Exposures (CVE)

References

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