Description
Unspecified vulnerability in ISC BIND 9.0.x through 9.3.x, 9.4 before 9.4.3-P5, 9.5 before 9.5.2-P2, 9.6 before 9.6.1-P3, and 9.7.0 beta, with DNSSEC validation enabled and checking disabled (CD), allows remote attackers to conduct DNS cache poisoning attacks by receiving a recursive client query and sending a response that contains (1) CNAME or (2) DNAME records, which do not have the intended validation before caching, aka Bug 20737. NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4022.
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 | 1:9.7.0.dfsg-1 | — |
| Debian 13 | bind9 | 1:9.7.0.dfsg-1 | — |
| Debian 12 | bind9 | 1:9.7.0.dfsg-1 | — |
| Debian 5.0 | bind9 | 1:9.6.ESV.R1+dfsg-0+lenny1 | DSA-2054-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | bind +7 | 30:9.3.6-4.P1.el5_4.2 | RHSA-2010:0062 |
Advisories 2
- RHSA-2010:0062 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2054-1 bind9 - cache poisoning Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=557121
- ADV-2010-0176 vdb-entry
- RHSA-2010:0062 vendor-advisory
- [oss-security] 20100119 BIND CVE-2009-4022 fix incomplete mailing-list
- https://www.isc.org/advisories/CVE-2009-4022v6
- 38240 third-party-advisory
- oval:org.mitre.oval:def:6815 vdb-entry signature
- ADV-2010-1352 vdb-entry
- USN-888-1 vendor-advisory
- 40086 third-party-advisory
- ADV-2010-0622 vdb-entry
- 38219 third-party-advisory
- MDVSA-2010:021 vendor-advisory
- oval:org.mitre.oval:def:8884 vdb-entry signature
- https://bugzilla.redhat.com/show_bug.cgi?id=554851
- [oss-security] 20100120 Re: BIND CVE-2009-4022 fix incomplete mailing-list
- http://wiki.rpath.com/wiki/Advisories:rPSA-2010-0018
- DSA-2054 vendor-advisory
- SUSE-SA:2010:008 vendor-advisory
- oval:org.mitre.oval:def:7512 vdb-entry signature