Description
The dns_to_ldap_dn_escape function in src/ldap_convert.c in bind-dyndb-ldap 1.1.0rc1 and earlier does not properly escape distinguished names (DN) for LDAP queries, which allows remote DNS servers to cause a denial of service (named service hang) via a "$" character in a DN in a DNS query.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | bind-dyndb-ldap | 1.1.0-0.9.b1.el6_3.1 | RHSA-2012:1139 |
Advisories 1
- RHSA-2012:1139 Red Hat Security Advisory: bind-dyndb-ldap security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 1027341 vdb-entry
- http://git.fedorahosted.org/cgit/bind-dyndb-ldap.git/commit/?id=f345805c73c294db42452ae966c48fbc36c48006
- RHSA-2012:1139 vendor-advisory
- binddyndbldap-dnstoldapdnescape-dos(77391) vdb-entry
- 50159 third-party-advisory
- 50086 third-party-advisory
- [oss-security] 20120802 bind-dyndb-ldap DoS CVE-2012-3429 mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=842466
- 54787 vdb-entry