#200412: A Security Vulnerability in Solaris libnsl(3LIB) may lead to a Denial of Service (DoS) to the rpcbind(1M) Service

A Security Vulnerability in Solaris libnsl(3LIB) may lead to a Denial of Service (DoS) to the rpcbind(1M) Service

Category :	Security
Release Phase :	Resolved
Bug Id :	4937207
Product :	Solaris 9 Operating System Solaris 8 Operating System
Date of Resolved Release :	09-JAN-2007

A Security Vulnerability in Solaris libnsl(3LIB) may lead to a Denial of Service (DoS) to the rpcbind(1M) Service

1. Impact

A security vulnerability in Solaris 8 or 9 handling of some malformed RPC requests may allow a local or remote unprivileged user to kill the rpcbind(1M) server, causing a Denial of Service (DoS) condition.

Sun acknowledges, with thanks, the BlueLane Research Team for bringing this issue to our attention.

This issue is also referenced in the following documents:

CVE-2008-4619 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4619

CVE-2007-0165 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0165

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

Solaris 8 without patch 108993-65
Solaris 9 without patch 113319-27

x86 Platform

Solaris 8 without patch 108994-65
Solaris 9 without patch 113719-21

Note: Solaris 10 is not affected by this issue.

3. Symptoms

Should the described issue occur, rpcbind(1M) will core dump after receiving a malformed RPC request, and the affected system will refuse connections to the rpcbind port. As a result, no new RPC based services can be provided by the affected system until a manual restart of the rpcbind service is performed. Depending on the coreadm(1M) settings, a core file may also be generated in the configured location.

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 8 with patch 108993-65 or later
Solaris 9 with patch 113319-27 or later

x86 Platform

Solaris 8 with patch 108994-65 or later
Solaris 9 with patch 113719-21 or later

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

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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.

Modification History

29-Jan-2007: Updated Impact section
29-Oct-2008: Updated Impact section for CVE reference
12-Nov-2008: Updated Impact section to add 2nd CVE reference

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