Security readout for executives and security teams
Plain-English summary
CVE-2019-13952 affects gdnsd DNS software when it parses a long, malformed IPv6 address in zone data. The documented vulnerable versions are before 2.4.3 and 3.x before 3.2.1. Business urgency depends on whether gdnsd is deployed and whether zone data can be influenced by untrusted sources.
Executive priority
Prioritize if gdnsd is part of production DNS or automated zone-management workflows. DNS instability can affect customer access and service reliability. If gdnsd is absent or current, priority is low after documentation of the finding.
Technical view
The issue is a stack-based buffer overflow in set_ipv6() in zscan_rfc1035.rl. Trigger material is malformed IPv6 data inside DNS zone data. The source bundle does not provide CVSS, CWE, exploitability, or confirmed impact beyond memory corruption risk in the parser.
Likely exposure
Exposure is most likely in organizations running gdnsd before 2.4.3 or 3.x before 3.2.1, especially where DNS zone data is imported, generated, delegated, or edited through automated pipelines or third-party workflows.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Evidence only supports a malformed zone-data parsing vulnerability, not internet-wide remote exploitation or a public weaponized exploit.
Researcher notes
Primary evidence is limited to the CVE description and upstream issue reference. Affected-product metadata in the bundle is sparse. Do not assume code execution, active exploitation, or broad remote reach without additional vendor or exploitability analysis.
Mitigation direction
- Inventory gdnsd deployments and identify exact running versions.
- Upgrade gdnsd to 2.4.3, 3.2.1, or later where applicable.
- Restrict who and what systems can modify gdnsd zone data.
- Validate generated or imported zone data before production reloads.
- Review upstream gdnsd guidance for any additional remediation notes.
Validation and detection
- Confirm whether gdnsd is used in authoritative DNS infrastructure.
- Check whether any instance runs below 2.4.3 or vulnerable 3.x below 3.2.1.
- Map all zone-data ingestion and generation paths.
- Review DNS service logs for crashes or reload failures around zone updates.
- Confirm production zone changes require trusted, reviewed inputs.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-13952 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/gdnsd/gdnsd/issues/185CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.