Sun(sm) Alert Notification
* Sun Alert ID: 102667
* Synopsis: Security Vulnerability in the Solaris 10 TCP Fusion Code
May Lead to a System Panic, Resulting in a Denial of Service (DoS)
* Category: Security
* Product: Solaris 10 Operating System
* BugIDs: 6348581
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 17-Oct-2006
* Date Closed: 17-Oct-2006
* Date Modified:
Solaris 10 systems may panic in the tcp_fuse_rcv_drain() TCP/IP
function when using TCP loopback connections, where both ends of the
connection are on the same system. This may allow a local unprivileged
user to cause a Denial of Service (DoS) condition on the affected
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 10 without patch 118833-23
* Solaris 10 without patch 118855-19
Note: Solaris 8 and Solaris 9 are not impacted by this issue.
A system panic in tcp_fuse_rcv_drain() TCP/IP function is
representative of this issue.
To work around the described issue until patches can be installed,
disable TCP Fusion by adding the following line to the "/etc/system"
file and rebooting the system:
set ip:do_tcp_fusion = 0x0
Undo the above change to the "/etc/system" file and reboot to
re-enable TCP Fusion.
Note: The workaround option above may affect performance.
This issue is addressed in the following releases:
* Solaris 10 with patch 118833-23 or later
* Solaris 10 with patch 118855-19 or later
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
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INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
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Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
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Security Vulnerability in the Solaris 10 TCP Fusion Code May Lead to a System Panic, Resulting in a Denial of Service (DoS)
Solaris 10 systems may panic in the tcp_fuse_rcv_drain() TCP/IP function when using TCP loopback connections, where both ends of the connection are on the same system.
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