CVE-2019-6476
An error in QNAME minimization code can cause BIND to exit with an assertion failure
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
An error in QNAME minimization code can cause BIND to exit with an assertion failure
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
CVE-2019-6476- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
EUVDEUVD-2019-16036
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
EUVD-2019-16036- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7rr8-wvj2-chhv
A defect in code added to support QNAME minimization can cause named to exit with an assertion...
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
GHSA-7rr8-wvj2-chhv- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
NVD
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
CVE-2019-6476- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-617
- Updated
- 2026-11-02
OSVALPINE-CVE-2019-6476
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
ALPINE-CVE-2019-6476- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVBELL-CVE-2019-6476
CVE-2019-6476 does not affect BellSoft software
- Record
BELL-CVE-2019-6476- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
- Record
CVE-2019-6476- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10650-1 No score
bind-9.16.20-1.4 on GA media
These are all security issues fixed in the bind-9.16.20-1.4 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10650-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
bindAlpine:v3.10 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.11 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.12 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.13 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.14 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.15 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.16 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.17 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.18 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.19 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
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| Package | Affected | Fixed |
|---|---|---|
bindAlpine:v3.20 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.21 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.22 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.23 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindAlpine:v3.24 |
9.14.0 up to 9.14.7-r0 | 9.14.7-r0 |
bindopenSUSE:Tumbleweed From an advisory covering 32 CVEs |
before 9.16.20-1.4 | 9.16.20-1.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-6476 is a medium vulnerability (CVSS 5.9) in Isc Bind, published October 17, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.96%, the 87th percentile. Fixed in bind 9.14.7-r0.
References
kb.isc.org/docs/cve-2019-6476
security.netapp.com/advisory/ntap-20191024-0004
support.f5.com/csp/article/K42238532?utm_source=f5support&%3Butm_medium=RSS
nvd.nist.gov/vuln/detail/CVE-2019-6476
github.com/advisories/GHSA-7rr8-wvj2-chhv
security.alpinelinux.org/vuln/CVE-2019-6476
Show 33 moreShow less
docs.bell-sw.com/security/cves/CVE-2019-6476
suse.com/security/cve/CVE-2006-4339