OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
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SecurityTracker Alert ID: 1021907 |
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SecurityTracker URL: http://securitytracker.com/id/1021907
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CVE Reference:
CVE-2009-0591
(Links to External Site)
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Date: Mar 25 2009
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Impact:
Modification of system information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 0.9.8h - 0.9.8j
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Description:
A vulnerability was reported in OpenSSL. A remote user can bypass certain security checks.
A remote user with access to a signer's private key can generate a specially crafted signature that is not valid but will be detected as valid. The vulnerability resides in the CMS_verify() function in the handling of an error condition with specially crafted signed attributes.
Only CMS users are affected.
Ivan Nestlerode reported this vulnerability.
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Impact:
A remote user can create an invalid signature that will be determined to be a valid signature.
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Solution:
The vendor has issued a fix (0.9.8k).
The vendor's advisory is available at:
http://www.openssl.org/news/secadv_20090325.txt
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Vendor URL: www.openssl.org/news/secadv_20090325.txt (Links to External Site)
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Cause:
Authentication error, State error
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Underlying OS:
Linux (Any), UNIX (Any), Windows (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Wed, 25 Mar 2009 13:43:11 -0500
Subject: OpenSSL
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http://www.openssl.org/news/secadv_20090325.txt
CVE-2009-0591
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