A Security Vulnerability in the ASN.1 Handling in Solaris OpenSSL May Lead to a Denial of Service (DoS) Condition

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A Security Vulnerability in the ASN.1 Handling in Solaris OpenSSL May Lead to a Denial of Service (DoS) Condition

1. Impact

A security vulnerability in the ASN.1 handling in the OpenSSL product (see openssl(5)) shipped with Solaris may allow a local or remote unprivileged user to cause a Denial of Service (DoS) to applications calling the "ASN1_STRING_print_ex()" printing function.

Additional information regarding this issue can be found in the following document:


2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform:

• Solaris 10 without patch 141742-01
• OpenSolaris based upon builds snv_01 through snv_112

x86 Platform:

• Solaris 10 without patch 140119-07
• OpenSolaris based upon builds snv_01 through snv_112

Notes:

1. Solaris 8 and Solaris 9 are not impacted by this issue.

2. Any OpenSSL application which prints out the contents of a certificate could be affected by this bug, including SSL servers, clients and S/MIME software. For example: commands such as openssl(1) and servers such as PostgreSQL are known to be vulnerable to this issue.

3. Solaris Secure Shell (SSH), Firefox and Thunderbird distributed with Solaris are not vulnerable to this issue.

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

3. Symptoms

There are no predictable symptoms that would indicate the described vulnerability has been exploited.

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 10 with patch 141742-01 or later
  
• OpenSolaris based upon builds snv_113 or later

x86 Platform:

• Solaris 10 with patch 140119-07 or later
  
• OpenSolaris based upon builds snv_113 or later

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

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Modification History

04-May-2009: Added additional "Notes" to Contributing Factors
08-Jun-2009: Updated Contributing Factors and Resolution sections; Resolved

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