Note: This is an archival copy of Security Sun Alert 228387 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1017334.1.
Article ID : 1017334.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2006-08-02
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

Local Users May be Able to Hang Systems That Have Loaded The Kernel Debugger kmdb(1)

Category
Security

Release Phase
Resolved

Product
Solaris 10 Operating System

Bug Id
6296934

Date of Resolved Release
19-JUL-2006

Impact

A local unprivileged user may be able to hang an x86 system that has loaded the kernel debugger kmdb(1). The ability to hang a system is a type of Denial of Service (DoS).


Contributing Factors

This issue can occur in the following release:

x86 Platform

  • Solaris 10 without patch 118855-15

Note 1: This issue does not affect the SPARC platform.

Note 2: This issue does not affect Solaris 8 or 9.

Note 3: This issue only affects systems which have loaded the kernel debugger, kmdb(1). In order to determine if a system has loaded kmdb(1) the following command can be used:

    $ modinfo | grep kmdb
    178 f7d54ce8 3b8 171 1 kmdb (kmdb driver 1.3)

If the system has not loaded kmdb(1), no output will be seen.


Symptoms

If the described issue occurs, the system will hang and be inaccessible both locally and via the network.


Workaround

There is no workaround. Please see the "Resolution" section below.


Resolution

This issue is addressed in the following release:

x86 Platform

  • Solaris 10 with patch 118855-15 or later


References

118855-15




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