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CVE-2012-3429

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2012-1139-01
Posted Aug 3, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1139-01 - The dynamic LDAP back end is a plug-in for BIND that provides back-end capabilities to LDAP databases. It features support for dynamic updates and internal caching that help to reduce the load on LDAP servers. A flaw was found in the way bind-dyndb-ldap performed the escaping of names from DNS requests for use in LDAP queries. A remote attacker able to send DNS queries to a named server that is configured to use bind-dyndb-ldap could use this flaw to cause named to exit unexpectedly with an assertion failure.

tags | advisory, remote
systems | linux, redhat
advisories | CVE-2012-3429
SHA-256 | 21ad281bbda64e6afba7cbfbd5bb1f6bc0aa4383815fd814c5f8361a16099c79
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