The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.
A flaw was found in the BIND DNSSEC NSEC/NSEC3 validation code. If BIND was running as a DNSSEC-validating resolver, it could incorrectly cache NXDOMAIN responses, as if they were valid, for records proven by NSEC or NSEC3 to exist. A remote attacker could use this flaw to cause a BIND server to return the bogus, cached NXDOMAIN responses for valid records and prevent users from retrieving those records (denial of service). The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-0097 to this issue.
The original fix for CVE-2009-4022 was found to be incomplete. BIND was incorrectly caching certain responses without performing proper DNSSEC validation. CNAME and DNAME records could be cached, without proper DNSSEC validation, when received from processing recursive client queries that requested DNSSEC records but indicated that checking should be disabled. A remote attacker could use this flaw to bypass the DNSSEC validation check and perform a cache poisoning attack if the target BIND server was receiving such client queries. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-0290 to this issue.
More information about these vulnerabilities can be found in the security advisory issued by RedHat Linux:
|Product:||Affected Version(s):||Risk Level:||Actions:|
|Avaya Voice Portal||5.0 including SP1 and SP2||Low||Upgrade to VP 5.1 or later.|
|Avaya Aura™ Session Manager||1.1, 5.2||Low||Upgrade to SM 6.0 or later.|
|Avaya Aura™ System Platform||1.1||Low||Upgrade to SP 6.0 or later.|
Recommended Actions for System Products:
Avaya strongly recommends that customers follow networking and security best practices by implementing firewalls, ACLs, physical security or other appropriate access restrictions. Though Avaya believes such restrictions should always be in place; risk to Avaya's product and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as a product actions are applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period.
Avaya software-only products operate on general-purpose operating systems. Occasionally vulnerabilities may be discovered in the underlying operating system or applications that come with the operating system. These vulnerabilities often do not impact the software-only product directly but may threaten the integrity of the underlying platform.
In the case of this advisory Avaya software-only products are not affected by the vulnerability directly but the underlying Linux platform may be. Customers should determine on which Linux operating system the product was installed and then follow that vendor's guidance.
|CVLAN||Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the CVLAN application.|
|Avaya Integrated Management Suite (IMS)||Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the IMS application.|
|Voice Portal||Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the Voice Portal application.|
|Avaya Aura™ Application Enablement Services 4.x/5.x||Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the AES application.|
Recommended Actions for Software-Only Products:
In the event that the affected package is installed, Avaya recommends that customers follow recommended actions supplied by RedHat Linux.
Additional information may also be available via the Avaya support website and through your Avaya account representative. Please contact your Avaya product support representative, or dial 1-800-242-2121, with any questions.
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V 1.0 - February 9, 2010 - Initial Statement issued.
V 2.0 - August 19, 2010 - Changed VP, SM and SP actions and advisory status to final.
Send information regarding any discovered security problems with Avaya products to either the contact noted in the product's documentation or firstname.lastname@example.org.
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