AIX getpwnam() function privilege escalation

aix-getpwnam-privilege-escalation (74679) The risk level is classified as HighHigh Risk

Description:

AIX could allow a local attacker to gain elevated privileges on the system, caused by an error in the getpwnam() function when customer extended LDAP user filtering is configured. A local attacker could exploit this vulnerability to gain lateral or elevated privileges on the system.

*CVSS:

Base Score: 6.9
  Access Vector: Local
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 6
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Privileges

Remedy:

Refer to IBM APAR IV18464, IV18637, or IV19077 for patch, upgrade or suggested workaround information. See References.

References:

  • IBM APAR IV18464: Potential Security Issue with getpwnam function using LDAP.
  • IBM APAR IV18637: Potential Security Issue with getpwnam function using LDAP.
  • IBM APAR IV19077: Potential Security Issue with getpwnam function using LDAP.
  • IBM SECURITY ADVISORY: Vulnerability in LDAP Authentication.
  • BID-53393: IBM AIX 'getpwnam()' Local Privilege Escalation Vulnerability
  • CVE-2012-0745: The getpwnam function in IBM AIX 5.3, 6.1, and 7.1 and VIOS 2.1.0.10 through 2.2.1.3 does not properly interact with customer-extended LDAP user filtering, which allows local users to gain privileges via unspecified vectors.
  • OSVDB ID: 81683: IBM AIX LDAP Authentication getpwnam() Function Local Privilege Escalation
  • SA49073: IBM AIX "getpwnam()" LDAP Filtering Privilege Escalation Vulnerability

Platforms Affected:

  • IBM AIX 5.3
  • IBM AIX 6.1
  • IBM AIX 7.1

Reported:

May 03, 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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