Security Vulnerability in the Solaris IP(7p) Kernel Module May Allow Remote Users to Panic the System, Resulting in a Denial of Service (DoS)

Category
Security

Release Phase
Resolved

Bug Id
6877954

Product
OpenSolaris

Date of Resolved Release
04-Dec-2009

Security Vulnerability in the Solaris IP(7p) Kernel Module May Allow Remote Users to Panic the System, Resulting in a Denial of Service (DoS)

1. Impact

A race condition security vulnerability in Solaris IP(7p) Kernel Module may allow a local or remote unprivileged user to panic the system, resulting in a Denial of Service (DoS).

2. Contributing Factors

SPARC Platform

OpenSolaris based upon builds snv_106 through snv_124

x86 Platform

OpenSolaris based upon builds snv_106 through snv_124

Note: Solaris 8, Solaris 9 and Solaris 10 are not affected by this issue.

3. Symptoms

If the described issue occurs, the system may panic with a stack trace similar to the following:

tcp_do_getsockname()
tcp_getsockname()
so_getsockname()

Or:

tcp_do_getpeername()
tcp_getpeername()
so_getpeername()

4. Workaround

To work around the described issue, edit the "/etc/sock2path" file as the 'root' user and modify the following section:

From:

#     Family   Type Protocol   Path|Module
            2           2           0             tcp
            2           2           6             tcp

           26          2         0             tcp
           26          2           6             tcp

To:

#     Family   Type Protocol   Path|Module
            2           2           0         /dev/tcp
            2           2           6         /dev/tcp

           26          2           0         /dev/tcp6
           26          2           6         /dev/tcp6

Note: iscsitgtd(1M) and ssh(1) are the Solaris services known to be affected by this issue and they should restarted by running the following commands as the root user after the "/etc/sock2path" file is edited:

# svcadm restart svc:/system/iscsitgt:default

# svcadm restart svc:/network/ssh:default

Other third party network services may be affected by this issue and they should be restarted for the workaround to be effective.

5. Resolution

SPARC Platform

OpenSolaris based on builds snv_125 or later

x86 Platform

OpenSolaris based on builds snv_125 or later

For more information on Security Sun Alerts, see 1009886.1.

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