How severe is CVE-2012-1191?

CVE-2012-1191 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2012-1191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1191?

CVE-2012-1191 affects D.j.bernstein Djbdns. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-1191?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-1191 published?

CVE-2012-1191 was published on 2012-02-17 and last updated on 2026-06-16.

CVE-2012-1191

CVE-2012-1191 is a medium-severity vulnerability in D.j.bernstein Djbdns with a CVSS 2.0 base score of 6.4. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: D.j.bernstein Djbdns
Published: 2012-02-17
Last modified: 2026-06-16

Description

The resolver in dnscache in Daniel J. Bernstein djbdns 1.05 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote attackers to trigger continued resolvability of revoked domain names via a "ghost domain names" attack.

Frequently asked questions

What is CVE-2012-1191?: The resolver in dnscache in Daniel J. Bernstein djbdns 1.05 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote attackers to trigger continued resolvability of revoked domain names via a "ghost domain names" attack.
How severe is CVE-2012-1191?: CVE-2012-1191 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2012-1191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1191?: CVE-2012-1191 affects D.j.bernstein Djbdns. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-1191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1191 published?: CVE-2012-1191 was published on 2012-02-17 and last updated on 2026-06-16.

References

https://www.isc.org/files/imce/ghostdomain_camera.pdf

Affected products (1)

cpe:2.3:a:d.j.bernstein:djbdns:1.05:*:*:*:*:*:*:*

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