Bug Id
6681520

Product
Solaris 10 Operating System
OpenSolaris

Date of Resolved Release
15-Jul-2009

A Security Vulnerability in the Solaris IP Filter (ipf(5)) May Lead to a Denial of Service (DoS) Condition

1. Impact

A security vulnerability in the Solaris IP Filter (ipfilter(5)) may allow a local or remote unprivileged user to panic the system. This is a type of Denial of Service (DoS).

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform:

• Solaris 10 with patch 125014-02 or later or with patch 120011-14 and without patch 141020-01
  
• OpenSolaris based upon builds snv_45 through snv_110

x86 Platform:

• Solaris 10 with patch 125015-02 or later or with patch 120012-14 and without patch 141021-01
  
• OpenSolaris based upon builds snv_45 through snv_110

Notes:

1. Solaris 8 and 9 do not bundle ipfilter(5) and are not impacted by this issue.

2. Only OpenSolaris installations including the following binary are impacted by this issue:


3. OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. The base build can be derived as follows:

$ uname -v
snv_101

4. A system is only vulnerable to this issue, if it uses IP Filter (ipfilter(5)). To determine if a system is using IP Filter, the following command can be run:

# svcs -xv ipfilter
svc:/network/ipfilter:default (IP Filter)
State: disabled since Fri Jun 05 10:26:13 2009
Reason: Disabled by an administrator.
See: http://sun.com/msg/SMF-8000-05
See: man -M /usr/share/man -s 5 ipfilter
See: /var/svc/log/network-ipfilter:default.log
Impact: This service is not running.

The above output indicates that ipfilter(5) is not running and the system is not vulnerable to this issue.

3. Symptoms

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

ipf:frpr_icmp+0x150()
ipf:frpr_ipv4hdr+0x174()
ipf:fr_makefrip+0x5c()
ipf:fr_check+0x1d8()
ipf:ipf_hook+0xb4()
ipf:ipf_hook_out()
<...>

4. Workaround

To work around this issue, disable ipfilter by using the following command:

# svcadm disable ipfilter

Note: Disabling the ipfilter(5) will deactivate all packet filtering rules configured on the system using ipf(1M).

5. Resolution

This issue is addressed in the following releases:

SPARC Platform:

• Solaris 10 with patch 141020-01 or later
• OpenSolaris based upon builds snv_111 or later

x86 Platform:

• Solaris 10 with patch 141021-01 or later
• OpenSolaris based upon builds snv_111 or later

For more information on Security Sun Alerts, see 1009886.1.

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 AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements.

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References

141020-01
141021-01





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