A security vulnerability which affects the Xsun(1) and Xprt(1) commands may allow a a local unprivileged user the ability to execute arbitrary code with the privileges of either the Xsun(1) or Xprt(1) command.

Sun acknowledges, with thanks, Eric Sheridan of Towson University for bringing this issue to our attention.

This issue can occur in the following releases:

SPARC Platform

• Solaris 7 without patch 108376-46
• Solaris 8 without patch 108652-93
• Solaris 9 without patch 112785-50
• Solaris 10 without patch 119059-05

x86 Platform

• Solaris 7 without patch 108377-41
• Solaris 8 without patch 108653-82
• Solaris 9 without patch 112786-39
• Solaris 10 without patch 119060-05

There are no predictable symptoms that would indicate the described issue has been exploited.

To work around the described issue, remove the setuid(2) and/or setgid(2) bit from Xsun(1) and Xprt(1).

Note: Performing the above procedure will disable the following:

1. The ability to run Xsun on Solaris x86.

2. Power management and Interactive Process Priority control on Solaris SPARC.

3. Xsun(1) and Xprt(1) ability to open Unix domain sockets and named pipe transports in the protected "/tmp/.X11-*" directories.

Note: These features will still be available if Xsun(1) is started via display managers such as dtlogin(1) or gdm(1), however, the system would still be vulnerable to this issue.

This issue is addressed in the following releases:

SPARC Platform

• Solaris 7 with patch 108376-46 or later
• Solaris 8 with patch 108652-93 or later
• Solaris 9 with patch 112785-50 or later
• Solaris 10 with patch 119059-05 or later

x86 Platform

• Solaris 7 with patch 108377-41 or later
• Solaris 8 with patch 108653-82 or later
• Solaris 9 with patch 112786-39 or later
• Solaris 10 with patch 119060-05 or later

• Updated Contributing Factors and Relief/Workaround sections

• State: Resolved
• Updated Contributing Factors and Relief/Workaround sections

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