Strix
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CVE-2011-4869

UnknownEPSS 3.10%

Last modified

CVE-2011-4869 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.10% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
3.10%

86.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
UnboundUnbound<= 1.4.12
UnboundUnbound0.0
UnboundUnbound0.1
UnboundUnbound0.2
UnboundUnbound0.3
UnboundUnbound0.4
UnboundUnbound0.5
UnboundUnbound0.6
UnboundUnbound0.7
UnboundUnbound0.7.1
UnboundUnbound0.7.2
UnboundUnbound0.8
UnboundUnbound0.09
UnboundUnbound0.10
UnboundUnbound0.11
UnboundUnbound1.0.0
UnboundUnbound1.0.1
UnboundUnbound1.0.2
UnboundUnbound1.1.0
UnboundUnbound1.1.1
UnboundUnbound1.2.0
UnboundUnbound1.2.1
UnboundUnbound1.3.0
UnboundUnbound1.3.1
UnboundUnbound1.3.2
UnboundUnbound1.3.3
UnboundUnbound1.3.4
UnboundUnbound1.4.0
UnboundUnbound1.4.1
UnboundUnbound1.4.2
UnboundUnbound1.4.3
UnboundUnbound1.4.4
UnboundUnbound1.4.5
UnboundUnbound1.4.6
UnboundUnbound1.4.7
UnboundUnbound1.4.8
UnboundUnbound1.4.9
UnboundUnbound1.4.10
UnboundUnbound1.4.11

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-4869?
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 severe is CVE-2011-4869?
Severity scoring for CVE-2011-4869 is pending analysis. The EPSS model estimates a 3.10% probability of exploitation in the next 30 days.
How do I fix CVE-2011-4869?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-4869?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST