IBM DB2 PUBLIC security bypass

ibm-db2-public-security-bypass (61872) The risk level is classified as MediumMedium Risk

Description:

IBM DB2 could allow a remote attacker to bypass security restrictions. An error during the revocation of privileges on a database object from the PUBLIC group results in the dependent functions not being marked INVALID. An attacker could exploit this vulnerability to bypass security restrictions to execute privileges on the functions.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Apply IBM APAR IC68015, available from IBM Support and Downloads. See References.

References:

  • IBM APAR IC68015: SECURITY: FUNCTIONS ARE NOT INVALIDATED NOR DROPPED EVEN WHEN THE OWNER LOSES SUFFICIENT PRIVILEGE TO ACCESS UNDERLYING OBJECTS.
  • IBM Support and Downloads : Security Vulnerabilities and HIPER APARs fixed in DB2 for Linux, UNIX, and Windows Version 9.7 Fix Pack 3.
  • BID-43291: IBM DB2 prior to 9.7 Fix Pack 3 Multiple Security Vulnerabilities
  • CVE-2010-3474: IBM DB2 9.7 before FP3 does not perform the expected drops or invalidations of dependent functions upon a loss of privileges by the functions' owners, which allows remote authenticated users to bypass intended access restrictions via calls to these functions, a different vulnerability than CVE-2009-3471.
  • OSVDB ID: 68121: IBM DB2 Dependent Function Privilege Loss Invalidation Weakness Access Restriction Bypass
  • SA41444: IBM DB2 Two Security Issues
  • SECTRACK ID: 1024457: IBM DB2 Privilege Revocation Error May Let Remote Authenticated Users Access Restricted Objects

Platforms Affected:

  • IBM DB2 Universal Database 9.7

Reported:

Sep 15, 2010

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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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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