IBM Tivoli Directory Server NULL cipher weak security

tds-nullcipher-weak-security (74303)

Medium Risk

Description:

IBM Tivoli Directory Server could provide weaker than expected security, caused by the use of NULL-MD5 and NULL-SHA ciphers in the default Transport Layer Security (TLS) configuration. A remote attacker could exploit this vulnerability to launch further attacks against the victim.

*CVSS:

Base Score:	6.4
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	None
Temporal Score:	5.6
Exploitability:	High
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Other

Remedy:

Refer to IBM Flash (Alert) 1591272 for patch, upgrade or suggested workaround information. See References.

References:

• IBM Security Bulletin 1591272: Security Bulletin: IBM Tivoli Directory Server use of NULL ciphers in default Transport Layer Security configuration would result in unencrypted communications (CVE-2012-0726).
• BID-53043: IBM Tivoli Directory Server Multiple Security Vulnerabilities
• CVE-2012-0726: The default configuration of TLS in IBM Tivoli Directory Server (TDS) 6.3 and earlier supports the (1) NULL-MD5 and (2) NULL-SHA ciphers, which allows remote attackers to trigger unencrypted communication via the TLS Handshake Protocol.
• OSVDB ID: 81357: IBM Tivoli Directory Server TLS Multiple Cipher Unencrypted Communication Weakness
• SA48872: IBM Tivoli Directory Server Paged Searches Denial of Service Vulnerability

Platforms Affected:

• IBM Tivoli Directory Server 6.1
• IBM Tivoli Directory Server 6.2
• IBM Tivoli Directory Server 6.3

Reported:

Apr 16, 2012

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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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