Note: This is an archival copy of Security Sun Alert 240086 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019486.1.
Article ID : 1019486.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2009-01-27
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

A Security Vulnerability in the Solaris ip(7P) Kernel Module's IP-in-IP Packet Processing May Lead to a Denial of Service (DoS)

Category
Security

Release Phase
Resolved

Bug Id
6673488

Product
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris

Date of Resolved Release
28-Jan-2009

A Security Vulnerability in the Solaris ip(7P) Kernel Module's IP-in-IP Packet Processing May Lead to a Denial of Service (DoS)

1. Impact

A security vulnerability in the Solaris ip(7P) kernel module's IP-in-IP packet processing may allow a local unprivileged user to cause a system panic, resulting in a Denial of Service (DoS).

Sun acknowledges with thanks, Evgeny Sonyagin for discovering and reporting this issue.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform
  • Solaris 9 without patch 114344-38
  • Solaris 10 without patch 138888-03
  • OpenSolaris based upon builds snv_01 though snv_85
x86 Platform
  • Solaris 9 without patch 119435-26
  • Solaris 10 without patch 138889-03
  • OpenSolaris based upon builds snv_01 though snv_85
Note: Solaris 8 is not impacted by this issue.

3. Symptoms

If this issue has been exploited, a system panic would occur, generating a stack trace similar to the following:
ipsec_latch_inbound+0x3c(60011e0cf38, 600110e7e48, c8, 26, 0, 0)
ip_bind_ipsec_policy_set+0x60(60011f6def0, 600199e0d40, 0, 600110e7e48,600161cc340, 600151b02c0)
tcp_get_ipsec_conn+0x2d8(6001634d500, 600110e7e48, 2a10035f218, 600151b02c0, 0,600199e0d40)
tcp_conn_request+0x1fc(40, 0, 60010955f00, 600121bd580, 88300001, 0)
squeue_enter_chain+0x90(60010955f00, 600199e0d40, 600199e0d40, 2060, 0, af795)
ip_fanout_proto_again+0x398(600199e0d40, 600110318a8, 600110318a8, 60010bd6a18,c8, 60010bd6a28)
ip_proto_input+0xacc(60010af6f70, 600199e0d40, 600109a84e0, 60010bd6a18,600110318a8, 600109a84f4)
ip_input+0xb74(600109a84e0, 300003d6040, 0, 600110318a8, 0, 0)
i_dls_link_rx+0x1f0(60011035e38, 300003d6040, 0, 6001634d500, 2a10035f6c0,2a10035f6c8)
mac_rx+0x8c(60011033e08, 300003d6040, 6001634d500, 0, 6001634d500, 60011033ef8)
bge_receive+0x564(5a, 60010982000, 8100, ffffffffffffffff, 2f5c, 0)
bge_intr+0x1ac(100000053, 60010982000, 100000053000000, 60010984de0, 0, 2c00)
pci_intr_wrapper+0xb8(60010bced30, 60010ade7a0, 0, 0, 60010b91208, 0)
intr_thread+0x168(0, 1845740, 0, 0, ffffffffffffffff, 300000b3c80)
idle+0x128(1814000, 0, 30000f50000, ffffffffffffffff, 2, 1813000)
thread_start+4(0, 0, 0, 0, 0, 0)

4. Workaround

There is no direct workaround for this issue. Until patches can be applied, sites may wish to disallow incoming IP-in-IP traffic, which can be done on the local system using a network traffic filtering tool such as ipfilter(5) which is shipped with Solaris 10 and later.

For example, on Solaris 10 the following ipf(1M) rule could be used:

block in log quick proto 4 from any to any

This rule disables IP-in-IP packets coming to the system. This may affect the existing configuration if tunnel interfaces are present.

Note that after adding this rule, IP packet filtering must be enabled for this workaround to take affect. Please see the ipf(1M) man page for details about adding new rules and enabling IP filtering.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform
  • Solaris 9 with patch 114344-38 or later
  • Solaris 10 with patch 138888-03 or later
  • OpenSolaris based upon builds snv_86 or later
x86 Platform
  • Solaris 9 with patch 119435-26 or later
  • Solaris 10 with patch 138889-03 or later
  • OpenSolaris based upon builds snv_86 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.

Copyright 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.


References

114344-38
138888-03
138889-03





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