CVE-2019-6468
BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is used
- Published
- Updated
- Reserved
- Assigned by
- isc
Description
In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| iscCNA (assigner) | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (5 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- If nxdomain-redirect is enabled (via configuration) in a vulnerable BIND release, a malicious party can cause BIND to exit by deliberately triggering the bug.
- CWE-617 (opens in a new tab)All about CWE-617 and its CVEs
Affected products
ISC · BIND 9 Supported Preview Edition
- affected BIND 9 9.10.5-S1 -> 9.11.5-S5
What to do
Solution: Upgrade to the patched release most closely related to your current version of BIND: BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. + BIND 9.11.5-S6 + BIND 9.11.6-S1
Workaround: Exploitation of this defect can be effectively prevented by disabling the nxdomain-redirect feature in the nameserver's configuration.
References (2)
- https://kb.isc.org/docs/cve-2019-6468 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.synology.com/security/advisory/Synology_SA_19_20 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-6468)Record last updated .