CVE-2011-1922

CVE-2011-1922 is a medium-severity vulnerability in Nlnetlabs Unbound with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Description

daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.

Frequently asked questions

What is CVE-2011-1922?
daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.
How severe is CVE-2011-1922?
CVE-2011-1922 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-1922 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1922?
CVE-2011-1922 primarily affects Nlnetlabs Unbound. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1922?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1922 published?
CVE-2011-1922 was published on 2011-05-31 and last updated on 2026-06-16.

References

Affected products (22)

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