A Security Vulnerability in IP Multicast Filter processing of Sockets may lead to a system panic or possible execution of Arbitrary Code

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A Security Vulnerability in IP Multicast Filter processing of Sockets may lead to a system panic or possible execution of Arbitrary Code

1. Impact

A security vulnerability in the Solaris 10 IP (see ip(7P)) kernel module relating to setting a socket's multicast filter may allow a local unprivileged user the ability to panic the system or execute arbitrary commands with all privileges. The ability to panic a system is a type of Denial of Service (DoS).

Sun acknowledges with thanks, Tobias Klein (http://www.trapkit.de/) for bringing this issue to our attention.

This issue is also referenced in the following document:



2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• Solaris 10 without patch 137111-01
• OpenSolaris based upon builds snv_13 through snv_91
  

x86 Platform

• Solaris 10 without patch 137112-01
• OpenSolaris based upon builds snv_13 through snv_91

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

3. Symptoms

The system may panic with a stack trace similar to the following:

bcopy
l_copy
ip_set_srcfilter
ip_sioctl_msfilter
ip_process_ioctl
ip_wput_nondata
ip_output
ip_wput
putnext
ar_wput
putnext
strdoioctl
strioctl
spec_ioctl
fop_ioctl
ioctl
sys_sysenter

4. Workaround

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

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 137111-01 or later
• OpenSolaris based upon builds snv_92 or later
  

x86 Platform

• Solaris 10 with patch 137112-01 or later
• OpenSolaris based upon builds snv_92 or later

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

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