CVE-2011-4869

Description

validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.

How to fix CVE-2011-4869

To remediate CVE-2011-4869, upgrade the affected package to a fixed version below.

• Debian/unbound—upgrade to 1.4.14-1 or later

Is CVE-2011-4869 being exploited?

Low — EPSS is 2.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 1.4.14-1

References (1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2011-4869