Apache Traffic Server cache poisoning

apache-traffic-cache-poisoing (61721)

Medium Risk

Description:

Apache Traffic Server could allow a remote attacker to poison the DNS cache, caused by the improper randomization of the DNS transaction ID and the source port number. An attacker could exploit this vulnerability to manipulate cache data and perform DNS Cache Poisoning.

*CVSS:

Base Score:	4.3
Access Vector:	Network
Access Complexity:	Medium
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	Partial
Availability Impact:	None
Temporal Score:	3.2
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Traffic Server (2.0.1 or later), available from the Apache Web site. See References.

References:

• Apache Web Site: Improve DNS resilience against spoofs and poisoning.
• NDSA20100830: Nth Dimension Security Advisory.
• BID-43111: Apache Traffic Server Remote DNS Cache Poisoning Vulnerability
• CVE-2010-2952: Apache Traffic Server before 2.0.1, and 2.1.x before 2.1.2-unstable, does not properly choose DNS source ports and transaction IDs, and does not properly use DNS query fields to validate responses, which makes it easier for man-in-the-middle attackers to poison the internal DNS cache via a crafted response.
• OSVDB ID: 67964: Apache Traffic Server Transaction ID / Source Port Randomization Weakness DNS Cache Poisoning
• SA41356: Apache Traffic Server DNS Cache Poisoning Vulnerability
• SECTRACK ID: 1024417: Apache Traffic Server Insufficient Randomization Lets Remote Users Poison the DNS Cache

Platforms Affected:

• Apache Traffic Server 2.0

Reported:

Aug 30, 2010

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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