Category
Security
Release Phase
Resolved
Bug Id
6834314
ProductSolaris 10 Operating System
OpenSolaris
Date of Workaround Release26-Aug-2009
Date of Resolved Release10-Sep-2009
A security vulnerability in the Solaris sockfs kernel module:
1. Impact
A security vulnerability in the Solaris sockfs kernel module may allow a local or remote unprivileged HTTP client to panic a vulnerable Solaris web server thereby resulting in a Denial of Service (DoS) to the system as a whole.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
- Solaris 10 with patch 118833-25 or later and without patch
141690-02
- OpenSolaris based upon builds snv_41 through snv_122
x86 Platform
- Solaris 10 with patch 118855-25 or later and without patch
141691-02
- OpenSolaris based upon builds snv_41 through snv_122
Note
1: Solaris 8 and Solaris 9 are
not impacted by this issue.
Note 2: This issue only occurs if a system is configured as an HTTP server utilizing the Solaris Network Cache Accelerator (nca(1)) and has logging enabled. To determine if NCA is enabled on the system, execute the following command:
$ grep status=enabled /etc/nca/ncakmod.conf
status=enabled
Please reference ncakmod.conf(4) for more information on configuring the NCA kernel module.
Physical interfaces registered to use the NCA feature are listed in the "/etc/nca/nca.if" file:
$ cat /etc/nca/nca.if
hme0
hme1
Please reference nca.if(4) for more information on specifying the physical interfaces for NCA.
To determine if NCA logging is enabled, execute the following command:
$ grep status=enabled /etc/nca/ncalogd.conf
status=enabled
Note 3: OpenSolaris
distributions may include additional bug fixes above and beyond the
build from which it was derived. To determine the base build of
OpenSolaris, the following command can be used:
$ uname -v
snv_111
3.
Symptoms
If the described issue occurs, the system will panic with a NULL pointer
dereference on nl7c_http_log. The stack trace will be similar to the
following:
nl7c_http_log+0x9a()
nl7c_logd_log+0x16f()
nl7c_parse+0x49f()
nl7c_process+0x141()
sotpi_recvmsg+0x618()
socktpi_read+0x84()
fop_read+0x31()
read+0x188()
read32+0xe()
_sys_sysenter_post_swapgs+0x14b()
4. Workaround
To work around the described issue until patches can be installed,
disable logging of NCA by setting "status=disabled" in
"/etc/nca/ncalogd.conf". Please refer to ncalogd.conf(4) for details.
A system reboot is required for the change to be effective. Please
refer to reboot(1M) for more details.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
- Solaris 10 with patch 141690-02 or later
- OpenSolaris based upon builds snv_123 or later
x86 Platform
- Solaris 10 with patch 141691-02 or later
- OpenSolaris based upon builds snv_123 or later
For more information on
Security Sun Alerts, see 1009886.1.
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Copyright 2000-2009 Sun Microsystems, Inc., 4150 Network Circle,
Santa
Clara, CA 95054 U.S.A. All rights reserved.Modification History
26-Aug-2009: Updated Contributing Factors and Resolution sections. Updated document release phase to Workaround.
10-Sep-2009: Updated the Contributing Factors and Resolution sections. Resolved.
References
141690-02
141691-02
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