Description
The query_findclosestnsec3 function in query.c in named in ISC BIND 9.6, 9.7, and 9.8 before 9.8.6-P2 and 9.9 before 9.9.4-P2, and 9.6-ESV before 9.6-ESV-R10-P2, allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via a crafted DNS query to an authoritative nameserver that uses the NSEC3 signing feature.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.9.5.dfsg-2 | — |
| Debian 13 | bind9 | 1:9.9.5.dfsg-2 | — |
| Debian 12 | bind9 | 1:9.9.5.dfsg-2 | — |
| Debian 7 | bind9 | 1:9.8.4.dfsg.P1-6+nmu2+deb7u2 | DSA-3023-1 |
| Debian 6.0 | bind9 | 1:9.7.3.dfsg-1~squeeze12 | DLA-48-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | bind +5 | 32:9.8.2-0.23.rc1.el6_5.1 | RHSA-2014:0043 |
| RHEL 5 | bind97 +4 | 32:9.7.0-21.P2.el5 | RHSA-2014:1244 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.10.3P4-21.1 | openSUSE-SU-2024:10467-1 |
Advisories 6
- RHSA-2014:0043 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2014:1244 Red Hat Security Advisory: bind97 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-48-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3023-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10467-1 bind-9.10.3P4-21.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1177 Internet Systems Consortium BIND9: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · May 29, 2025
References
- 1029589 vdb-entry
- RHSA-2014:0043 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1051717
- DSA-3023 vendor-advisory
- MDVSA-2014:002 vendor-advisory
- APPLE-SA-2014-10-16-3 vendor-advisory
- 56574 third-party-advisory
- openSUSE-SU-2014:0199 vendor-advisory
- 56522 third-party-advisory
- FEDORA-2014-0858 vendor-advisory
- http://linux.oracle.com/errata/ELSA-2014-1244
- 56442 third-party-advisory
- SSA:2014-028-01 vendor-advisory
- 61199 third-party-advisory
- SUSE-SU-2015:0480 vendor-advisory
- HPSBUX02961 vendor-advisory
- 56427 third-party-advisory
- 56871 third-party-advisory
- SSA:2014-175-01 vendor-advisory
- openSUSE-SU-2014:0202 vendor-advisory
- 56425 third-party-advisory
- https://kb.isc.org/article/AA-01085
- https://support.apple.com/kb/HT6536
- 56493 third-party-advisory
- FEDORA-2014-0811 vendor-advisory
- FreeBSD-SA-14:04 vendor-advisory
- 101973 vdb-entry
- https://kb.isc.org/article/AA-01078
- 61343 third-party-advisory
- 61117 third-party-advisory
- 64801 vdb-entry
- USN-2081-1 vendor-advisory