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CVE Record

CVE-2012-1192: The resolver in Unbound before 1.4.11 overwrites cached server names and TTL values in NS records during th...

The resolver in Unbound before 1.4.11 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.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This CVE affects Unbound DNS resolvers before 1.4.11. A remote attacker could make revoked domain names continue resolving by manipulating how cached NS record names and TTL values are overwritten. For executives, the main risk is trust in DNS resolution, not direct server takeover.

Executive priority

Prioritize remediation for internet-facing or shared recursive resolvers, especially those supporting critical business networks. The issue can undermine DNS revocation decisions, but the provided evidence does not support emergency active-exploitation claims.

Technical view

Unbound’s resolver incorrectly overwrote cached server names and TTLs in NS records while processing A record responses. The CVE describes this as enabling a “ghost domain names” attack, where revoked domains can remain resolvable. The bundle does not provide CVSS, CPEs, or detailed patch notes.

Likely exposure

Exposure is most likely where an organization runs Unbound recursive DNS resolver versions before 1.4.11. The provided affected-product metadata is incomplete and lists no CPEs, so asset validation must rely on installed Unbound version evidence.

Exploitation context

The CVE says remote attackers can trigger the condition. The source bundle does not cite KEV listing, active exploitation, public exploit code, or observed campaigns. Treat exploitation status as unconfirmed from the provided evidence.

Researcher notes

Key evidence gaps are missing CVSS, missing CPEs, and limited remediation detail in the supplied bundle. Analysis should focus on Unbound version confirmation and whether resolver caching behavior could preserve revoked domain resolvability in the local deployment.

Mitigation direction

  • Identify any Unbound resolver instances and their versions.
  • Upgrade Unbound deployments older than 1.4.11 per vendor guidance.
  • Review vendor advisories or release notes for deployment-specific remediation details.
  • Flush resolver caches after remediation if vendor guidance recommends it.

Validation and detection

  • Inventory DNS resolver software across production, staging, and network appliances.
  • Confirm Unbound versions are 1.4.11 or later where present.
  • Check DNS resolver logs for unusual persistence of revoked or expired domains.
  • Document any compensating controls if immediate upgrade is not possible.
Prepared
Confidence
medium
Sources
3

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2012-1192 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.