A Security Vulnerability in rpc.ypupdated(1M) May Allow Execution of Arbitrary Code When Run in Insecure Mode

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A Security Vulnerability in rpc.ypupdated(1M) May Allow Execution of Arbitrary Code When Run in Insecure Mode

1. Impact

A security vulnerability in the rpc.ypupdated(1M) daemon, when configured to run in the insecure mode via the "-i" option, may allow local or remote unprivileged users to execute arbitrary code with root privileges.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform:

• Solaris 8 without patch 138885-01
  
• Solaris 9 without patch 138575-01
  
• Solaris 10 without patch 139481-01
  
• OpenSolaris based upon builds snv_01 through snv_89

x86 Platform:

• Solaris 8 without patch 138886-01
  
• Solaris 9 without patch 138576-01
  
• Solaris 10 without patch 139482-01
  
• OpenSolaris based upon builds snv_01 through snv_89

Note: Only OpenSolaris installations including the affected binary listed below are affected by this issue :


Note: OpenSolaris distributions may include additional bug fixes above and beyond the base build from which it was derived. The base build can be derived as follows:

$ uname -a
SunOS  phys-node-1 5.11 snv_86 i86pc i386 i86pc

3. Symptoms

There are no predictable symptoms to indicate the described issue has been exploited to execute arbitrary code.

4. Workaround

To work around the described issue, do not run rpc.ypupdated(1M) using the "-i" option (insecure mode).

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 8 with patch 138885-01 or later
  
• Solaris 9 with patch 138575-01 or later
  
• Solaris 10 with patch 139481-01 or later
  
• OpenSolaris based upon build snv_90 or later

x86 Platform

• Solaris 8 with patch 138886-01 or later
  
• Solaris 9 with patch 138576-01 or later
• Solaris 10 with patch 139482-01 or later
• OpenSolaris based upon build snv_90 or later

For more information on Security Sun Alerts, see Technical Instruction ID 213557.

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Modification History

23-Jun-2008: Updated Workaround section
03-Dec-2008: Updated Contributing Factors and Resolution sections, now Resolved

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