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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
OpenSSL Cryptographic Message Syntax Processing Flaw Lets Remote Users Trigger Memory Errors
SecurityTracker Alert ID:  1024051
SecurityTracker URL:  http://securitytracker.com/id/1024051
CVE Reference:   CVE-2010-0742   (Links to External Site)
Date:  Jun 2 2010
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.9.8h
Description:   A vulnerability was reported in OpenSSL. A remote user can write to invalid memory addresses on the target system.

A remote user can send specially crafted Cryptographic Message Syntax (CMS) structures containing OriginatorInfo to write to invalid memory addresses or trigger a double-free on the target system.

Only the CMS code is affected, which exists in version 0.9.8h and later (but disabled by default) and in version 1.0.0 (enabled by default).

Ronald Moesbergen reported this vulnerability.

Impact:   A remote user can write to invalid memory addresses on the target system.

[Editor's note: The resulting impact was not specified.]

Solution:   The vendor has issued a fix (0.9.8o, 1.0.0a).

The vendor's advisory is available at:

http://www.openssl.org/news/secadv_20100601.txt

Vendor URL:  www.openssl.org/news/secadv_20100601.txt (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 2 2010 (HP Issues Fix for HP-UX) OpenSSL Cryptographic Message Syntax Processing Flaw Lets Remote Users Trigger Memory Errors
HP has issued a fix for HP-UX 11.11, 11.23, and 11.31.
Dec 22 2010 (Blue Coat Issues Fix for Reporter) OpenSSL Cryptographic Message Syntax Processing Flaw Lets Remote Users Trigger Memory Errors
Blue Coat has issued a fix for Blue Coat Reporter.



 Source Message Contents

Date:  Wed, 02 Jun 2010 14:17:10 +0000
Subject:  OpenSSL


http://www.openssl.org/news/secadv_20100601.txt

OpenSSL Security Advisory [01-Jun-2010]

Two security flaws have been fixed in OpenSSL 0.9.8o and OpenSSL 1.0.0a.

Invalid ASN1 module definition for CMS.
=======================================

CMS structures containing OriginatorInfo are mishandled this can write to
invalid memory addresses or free up memory twice
(CVE-2010-0742).

This bug is only present in the CMS code: the older PKCS#7 code is not affected.

CMS is only present in OpenSSL 0.9.8h and later where it is disabled by
default and 1.0.0 where it is enabled by default.

Users of OpenSSL CMS code should update to 0.9.8o or 1.0.0a which contains a
patch to correct this issue.

Thanks to Ronald Moesbergen for reporting this issue.

Invalid Return value check in pkey_rsa_verifyrecover
====================================================

When verification recovery fails for RSA keys an uninitialised buffer with an
undefined length is returned instead of an error code (CVE-2010-1633).

This bug is only present in OpenSSL 1.0.0 and only affects applications that
call the function EVP_PKEY_verify_recover(). As this function is not present
in previous versions of OpenSSL and not used by OpenSSL internal code very few
applications should be affected. The OpenSSL utility application "pkeyutl" does 
use this function.

Affected users should update to 1.0.0a which contains a patch to correct this
bug.

Thanks to Peter-Michael Hager for reporting this issue.


References
===========

URL for this Security Advisory:
http://www.openssl.org/news/secadv_20100601.txt


 
 


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