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CVE Record

CVE-2019-25039: Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c.

Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This CVE describes a possible integer overflow in Unbound before 1.9.5. The key business point is that the vendor disputes exploitability: the CVE states a running Unbound installation cannot be exploited remotely or locally. Treat this as patch hygiene for older Unbound packages, not an emergency signal.

Executive priority

Low priority unless legacy Unbound packages are common or compliance requires closure. Address through normal maintenance windows and vulnerability management tracking, while noting the vendor dispute and absence of active-exploitation evidence.

Technical view

The reported flaw is an integer overflow in a size calculation in Unbound's respip/respip.c. Debian and NetApp published security references, but the CVE record notes vendor dispute and gives no CVSS, CWE, or exploitability details. No source in the bundle establishes active exploitation.

Likely exposure

Exposure is most plausible where Unbound versions before 1.9.5 remain installed, including packaged distributions or products referencing Unbound. The bundle does not identify specific vulnerable configurations, reachable services, or exploitable runtime conditions.

Exploitation context

The source bundle provides no exploit reports, no KEV listing, and no supported claim of active exploitation. The CVE description explicitly says the vendor disputes that a running Unbound installation is remotely or locally exploitable.

Researcher notes

The record is unusually caveated: code may contain an integer-overflow pattern, but the vendor disputes practical exploitability. Researchers should avoid assuming impact beyond the cited respip size calculation and should rely on vendor or distro analysis for reachability.

Mitigation direction

  • Inventory systems and appliances running Unbound or bundled Unbound components.
  • Upgrade Unbound packages to vendor-supported releases, prioritizing versions at or beyond 1.9.5.
  • Review Debian LTS and NetApp guidance for affected downstream packages or products.
  • Monitor vendor advisories for clarifications, since exploitability is disputed.

Validation and detection

  • Check installed Unbound package versions against the 1.9.5 threshold.
  • Confirm whether downstream products bundle Unbound and list this CVE in advisories.
  • Verify patch status through package manager or vendor appliance update records.
  • Document any exception where vendor guidance states the installation is not affected.
Prepared
Confidence
medium
Sources
5

Public sources used

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

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CVE-2019-25039 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
4Source 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.