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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1413
          Heap Overflow in a Regular Expression Parser in Network
              Security Services (NSS) may Affect SSL Clients
                              15 October 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Solaris 9
                   Solaris 10
                   Sun Java Enterprise System 5
                   Sun Java Enterprise System 2005
Publisher:         Sun Microsystems
Operating System:  Solaris
                   Linux variants
                   HP-UX
                   Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-2404  

Reference:         ESB-2009.1252
                   ESB-2009.1223
                   ESB-2009.1184

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-267031-1

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Solution Type: Sun Alert
Solution  267031 :   Heap Overflow in a Regular Expression Parser in
Network Security Services (NSS) may Affect SSL Clients (CVE-2009-2404)          
Bug ID: 6874719

Product:
Solaris 9 Operating System
Solaris 10 Operating System
Sun Java Enterprise System 5
Sun Java Enterprise System 2005

Date of Resolved Release: 13-Oct-2009

SA Document Body
A heap overflow vulnerability in Network Security Services (NSS):

1. Impact

A heap overflow vulnerability in Network Security Services (NSS) may
allow a remote SSL server to cause a Denial of Service (DoS) to SSL
client applications or to possibly execute arbitrary code with the
privileges of the SSL client application, via a long domain name in
the subject's Common Name (CN) field of an X.509 certificate, related
to the "cert_TestHostName" function.
Firefox, Thunderbird, Pidgin and Evolution are examples of vulnerable
SSL client applications.

This issue is also described in the following document:
    CVE-2009-2404 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2404

2. Contributing Factors

This issue can occur in the following releases:
SPARC Platform
  * Solaris 9 without patch 119211-21
  * Solaris 10 without patch 119213-20
  * Sun Java Enterprise System 2005Q4 (for Solaris 8) without patch
    119209-21
  * Sun Java Enterprise System 2005Q4 (for Solaris 9) without patch
    119211-21
  * Sun Java Enterprise System 2005Q4 (for Solaris 10) without patch
    119213-20
  * Sun Java Enterprise System 5 without patch 125358-09

x86 Platform
  * Solaris 9 without patch 119212-21
  * Solaris 10 without patch 119214-20
  * Sun Java Enterprise System 2005Q4 (for Solaris 9) without patch
    119212-21
  * Sun Java Enterprise System 2005Q4 (for Solaris 10) without patch
    119214-20
  * Sun Java Enterprise System 5 without patch 125359-09

Linux Platform
  * Sun Java Enterprise System 2005Q4 and Sun Java Enterprise System 5
    (for RHEL2.1 and RHEL3.0) without patch 142506-02
  * Sun Java Enterprise System 5 (for RHEL4.0 and RHEL5.0) without
    patch 121656-20

HP-UX
  * Sun Java Enterprise System 2005Q4 and Sun Java Enterprise System 5
    without patch 124379-11

Windows Platform
  * Sun Java Enterprise System 2005Q4 without patch 124392-10
  * Sun Java Enterprise System 5 without patch 125923-09

Note 1: Sun Java Enterprise System is not supported on Solaris 8 x86.
Note 2: To determine if a package or a patch is installed on a system,
follow these instructions:
Solaris Platform
To determine if the package SUNWtls is installed, the following
command may be used:
 $ /usr/bin/pkginfo -l SUNWtls

Linux Platform

To determine if the package "sun-nss" is installed and the version of
the installed package, the following command may be used:
 $ /bin/rpm -q sun-nss

Note: Linux "sun-nss" packages 3.12.2 and earlier are vulnerable to
this issue.
HP-UX Platform
To determine if the package "sun-nss" is installed, the following
command may be used:
 $ /usr/sbin/swlist sun-nss

To determine which patch level for "sun-nss" is installed, the
following command may be used:
 $ /usr/sbin/swlist 124379\*

Windows Platform
To determine if "Sun Java Enterprise System" is installed, look into
"Add or Remove Programs" from the "Control Panel" and check if "Sun
Java(TM) Enterprise System 2005Q4" or"Sun Java(TM) Enterprise System
5" is listed as being currently installed.
To determine the list of JES patches installed on the system, the
following command may be used:
 <JES installation directory>\utils\patch\ListJavaESPatches.exe

Note 3: All systems with NSS versions prior to NSS 3.12.3 are
potentially vulnerable to this issue.

Systems with NSS 3.12.3 using the environment variable named
"NSS_USE_SHEXP_IN_CERT_NAME" are also potentially vulnerable.
Systems with NSS 3.12.3 NOT using the environment variable named
"NSS_USE_SHEXP_IN_CERT_NAME" are NOT vulnerable.
Systems with NSS 3.12.4 (and later versions), wether or not using the
environment variable named "NSS_USE_SHEXP_IN_CERT_NAME", are NOT
vulnerable.

3. Symptoms

There are no symptoms that would indicate the described issue has been
exploited to execute abitrary code. A crafted X.509 certificate which
may trigger the vulnerability would contain an unusually long domain
name in the Common Name (CN) field.

4. Workaround

To work around the described issue on systems with NSS 3.12.3 only, do
not set the "NSS_USE_SHEXP_IN_CERT_NAME" environment variable.

5. Resolution

This issue is addressed in the following releases WITHOUT the
environment variable NSS_USE_SHEXP_IN_CERT_NAME set:
SPARC Platform
  * Solaris 9 with patch 119211-21 or later
  * Solaris 10 with patch 119213-20 or later
  * Sun Java Enterprise System 2005Q4 (for Solaris 8) with patch
    119209-21 or later
  * Sun Java Enterprise System 2005Q4 (for Solaris 9) with patch
    119211-21 or later
  * Sun Java Enterprise System 2005Q4 (for Solaris 10) with patch
    119213-20 or later
  * Sun Java Enterprise System 5 with patch 125358-09 or later

x86 Platform
  * Solaris 9 with patch 119212-21 or later
  * Solaris 10 with patch 119214-20 or later
  * Sun Java Enterprise System 2005Q4 (for Solaris 9) with patch
    119212-21 or later
  * Sun Java Enterprise System 2005Q4 (for Solaris 10) with patch
    119214-20 or later
  * Sun Java Enterprise System 5 with patch 125359-09 or later

Linux Platform
  * Sun Java Enterprise System 2005Q4 and Sun Java Enterprise System 5
    (for RHEL2.1 and RHEL3.0) with patch 142506-02 or later
  * Sun Java Enterprise System 5 (for RHEL4.0 and RHEL5.0) with patch
    121656-20 or later

HP-UX
  * Sun Java Enterprise System 2005Q4 and Sun Java Enterprise System 5
    with patch 124379-11 or later

Windows Platform
  * Sun Java Enterprise System 2005Q4 with patch 124392-10 or
    later
  * Sun Java Enterprise System 5 with patch 125923-09 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,
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AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
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This Sun Alert notification contains Sun proprietary and confidential
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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

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