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TI-2019-09900 Aliases CVE-2019-13207GHSA-mgj6-9wrc-v2rp

nsd-checkzone in NLnet Labs NSD 4.2.0 has a Stack-based Buffer Overflow in the dname_concatenate() function in dname.c.

Priority MEDIUM 46CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

nsd-checkzone in NLnet Labs NSD 4.2.0 has a Stack-based Buffer Overflow in the dname_concatenate() function in dname.c.

Why it matters now

EPSS 0.02026 81st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nlnetlabs:name_server_daemon:4.2.0:*:*:*:*:*:*:*4.2.0VulnerableNLNETLABS
  • cpe:2.3:a:nlnetlabs:name_server_daemon:4.2.0:*:*:*:*:*:*:* Versions 4.2.0 Vulnerable ·NLNETLABS

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-13207
  2. 2026-10-03 Alias added: GHSA-mgj6-9wrc-v2rp

References

Exploit 1

Advisory 1

  • TI-2020-17464 Local symlink attack in Unbound and NSD CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences