Out-of-bounds Write Affecting nsd package, versions <4.2.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-NSD-11762545
- published10 Aug 2025
- disclosed3 Jul 2019
Introduced: 3 Jul 2019
CVE-2019-13207 (opens in a new tab)How to fix?
Upgrade Debian:14 nsd to version 4.2.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nsd package and not the nsd package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
nsd-checkzone in NLnet Labs NSD 4.2.0 has a Stack-based Buffer Overflow in the dname_concatenate() function in dname.c.
References
- https://security-tracker.debian.org/tracker/CVE-2019-13207
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FDS4H7WVHQGCX3LF72F5K22VJXN7HDBB/
- https://github.com/NLnetLabs/nsd/issues/20
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-13207
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDS4H7WVHQGCX3LF72F5K22VJXN7HDBB/