Vulnerability in the Solaris 10 Event Port Implementation May Lead to a System Panic, Resulting in a Denial of Service (DoS)

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Security Vulnerability in the Solaris 10 Event Port Implementation May Lead to a System Panic (See below for Details)

1. Impact

A security vulnerability in the Solaris 10 event port implementation may lead to a system panic when executing an application program that submits and retreives user-defined events from a port.  This may allow a local unprivileged user to cause a system panic resulting in Denial of Service (DoS) condition in the affected host.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• Solaris 10 without patch 137111-01

x86 Platform

• Solaris 10 without patch 137112-01

Note: Solaris 8 and Solaris 9 are not impacted by this issue.

3. Symptoms

If the described issue occurs, the following panic string and stack trace may be seen:

    BAD TRAP: type=31 rp=2a102e39720 addr=30 mmu_fsr=0 occurred in module "genunix" due to a NULL pointer dereference
    <trap>genunix:pollwakeup+0x28()
    genunix:port_send_event+0x114()
    portfs:port_send+0x48()
    portfs:portfs+0x250(?)
    unix:syscall_trap+0xac()

4. Workaround

There is no workaround for this issue. Please see the Resolution section below.

5. Resolution

This issue is addressed in the following release:

SPARC Platform

• Solaris 10 with patch 137111-01 or later

x86 Platform

• Solaris 10 with patch 137112-01 or later

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

http://sunsolve.sun.com/search/document.do?assetkey=1-61-213557-1

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