nscd DNS "PTR" record is improperly validated against "A" records
| nscd-dns-ptr-validation (8745) |  Low Risk |
Description:
The Name Service Cache Daemon (nscd) could allow a local attacker to obtain sensitive information. When a DNS (Domain Name System) "PTR" request is made, the information returned is cached. If an "A" record is later requested, the information from the cached "PTR" record is returned, instead of querying for the "A" record.
Platforms Affected:
- SCO, Caldera OpenLinux Server 3.1
- SCO, Caldera OpenLinux Server 3.1.1
- SCO, Caldera OpenLinux Workstation 3.1
- SCO, Caldera OpenLinux Workstation 3.1.1
Remedy:
No remedy available as of November 29, 2008.
Consequences:
Obtain Information
References:
- Caldera International, Inc. Security Advisory CSSA-2002-013.0, Linux: Name Service Cache Daemon (nscd) advisory at ftp://ftp.sco.com/pub/security/OpenLinux/CSSA-2002-013.0.txt.
- BID-4399: GNU nscd Incorrect Hosts Cache Behavior Vulnerability
- CVE-2002-0511: The default configuration of Name Service Cache Daemon (nscd) in Caldera OpenLinux 3.1 and 3.1.1 uses cached PTR records instead of consulting the authoritative DNS server for the A record, which could make it easier for remote attackers to bypass applications that restrict access based on host names.
Reported:
Mar 26, 2002
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