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Category:   Application (Security)  >   Sun Crypto Accelerator Vendors:   Sun
(Sun Issues Fix for Crypto Accelerator) Re: OpenSSL Has Multiple Buffer Overflows That Allow Remote Users to Execute Arbitrary Code with Root Privileges
SecurityTracker Alert ID:  1005105
SecurityTracker URL:  http://securitytracker.com/id/1005105
CVE Reference:   CVE-2002-0655, CVE-2002-0656, CVE-2002-0657, CVE-2002-0659   (Links to External Site)
Date:  Aug 22 2002
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.0
Description:   Four buffer overflow conditions were reported in OpenSSL. All four may allow a remote user to execute arbitrary code.

The vendor has reported that A.L. Digital Ltd and The Bunker have uncovered multiple buffer overflows in OpenSSL, discovered during a security review.

A remote user could create a specially crafted, oversized client master key and use SSL2 to trigger an overflow on an SSL server. According to the report, this vulnerability was independently discovered by Neohapsis, which has confirmed that the overflow can be exploited to execute arbitrary code.

A remote user with an SSL server could create a specially crafted, oversized session ID and supply this ID to a target client using SSL3 to trigger an overflow.

A remote user could supply a specially crafted, oversized master key to an SSL3 server to trigger an overflow. It is reported that this flaw affects OpenSSL 0.9.7 prior to version 0.9.7-beta3 when Kerberos is enabled.

Several buffers used for ASCII representations of integers are reportedly too small on 64 bit platforms.

The report also states that other potential buffer overflows that are currently considered to be non-exploitable have been discovered.

The vendor notes that Adi Stav and James Yonan independently reported that the ASN1 parser can be confused by certain invalid encodings, potentially allowing a remote user to cause denial of service conditions. An OpenSSL-based application that use the ASN1 library to parse untrusted data (including all SSL or TLS applications using S/MIME [PKCS#7] or certificate generation routines) are affected.

Impact:   A remote user acting as an SSL client could execute arbitrary code on an SSL server. A remote user acting as an SSL server could cause arbitrary code to be executed on an SSL client that is connecting to the server. In each case, the code would run with privileges of the affected implementation.

A remote user may be able cause denial of service conditions.

Solution:   Sun reports that the Sun Crypto Accelerator 1000 card is affected when configured to work with the Apache web server. When configured to work with iPlanet, it is not affected.

Sun has issued a fix for the Sun Crypto Accelerator 1000 version 1.0 (for Solaris 8). Obtain patch 112869-02 or later.

A final solution is pending completion for Solaris 9.

It is reported that a workaround is to disable SSLv2 support in Apache by adding an SSLProtocol line to /etc/apache/httpd.conf. The line should read:

SSLProtocol all -SSLv2

Vendor URL:  sunsolve.Sun.COM/pub-cgi/retrieve.pl?doc=fsalert%2F46605 (Links to External Site)
Cause:   Boundary error, Exception handling error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  8.0, 9.0

Message History:   This archive entry is a follow-up to the message listed below.
Jul 30 2002 OpenSSL Has Multiple Buffer Overflows That Allow Remote Users to Execute Arbitrary Code with Root Privileges



 Source Message Contents

Subject:  Sun Crypto Accelerator 1000 (46605)


http://sunsolve.Sun.COM/pub-cgi/retrieve.pl?doc=fsalert%2F46605

Sun issued an Alert Notification (46605) warning that the Sun Crypto
Accelerator 1000 software is v=Vulnerable to the recently reported
OpenSSL security vulnerabilities.

According to the report, Solaris 8 or 9 systems may be affected if they
have the Sun Crypto Accelerator 1000 board and are configured to use the
Apache web server.  The impact may include denial of service attacks,
service interruptions, and in some cases a local or remote attacker may
be able to execute arbitrary code on the Solaris 8 or 9 systems and
possibly gain elevated privileges.

Sun reports that Solaris 8 or 9 systems with the Sun Crypto Accelerator
1000 board that are configured to use the iPlanet web server are not
affected by this issue. 

It is reported that a workaround is to disable SSLv2 support in Apache
by adding an SSLProtocol line to /etc/apache/httpd.conf. The line should
read: 

SSLProtocol all -SSLv2                        


Sun has issued a fix for Solaris 8:

Sun Crypto Accelerator 1000 1.0 (for Solaris 8) with patch 112869-02 or
later 

A final solution is pending completion for Solaris 9. 


Category: Security 
Product: Sun Crypto Accelerator 1000 
BugIDs: 4725003 
Avoidance: Workaround, Patch 
State: Committed 
Date Released: 20-Aug-2002 
Date Closed: 
Date Modified: 

[Editor's note:  The original Sun alert is not available on our system
due to a restrictive copyright statement and Terms of Use that prohibit
redistribution on the Sun alert.]


 
 


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