Geo++ GNCASTER nonce replay

gncaster-nonce-replay (55977)

Medium Risk

Description:

Geo++ GNCASTER could allow a remote attacker to launch a replay attack. The server generates a nonce for HTTP Digest authentication and utilizes the same nonce for all other authentication until it is restarted. A remote attacker could exploit this vulnerability using a network sniffing tool to capture packets and replay them at a later time.

*CVSS:

Base Score:	7.5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	5.5
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Geo++ (1.4.0.8 or later), available from the Geo++ Web site. See References.

References:

• Geo++ Web site: GNCASTER.
• rt-sa-2010-003: Geo++(R) GNCASTER: Faulty implementation of HTTP Digest Authentication .
• CVE-2010-0554: The HTTP Authentication implementation in Geo++ GNCASTER 1.4.0.7 and earlier uses the same nonce for all authentication, which allows remote attackers to hijack web sessions or bypass authentication via a replay attack.
• OSVDB ID: 62014: Geo++ GNCASTER HTTP Digest Authentication Nonce Regeneration Weakness
• SA38323: Geo++ GNCASTER Multiple Weaknesses and Vulnerabilities

Platforms Affected:

• Geo++ GNCASTER 1.4.0.7

Reported:

Jan 27, 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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