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AUSCERT External Security Bulletin Redistribution
ESB-2007.0453 -- [Solaris]
Security Vulnerability in RSA Signature Verification Affects
GnuTLS Library Versions Prior to 1.4.4
25 June 2007
AusCERT Security Bulletin Summary
Product: GnuTLS Library Versions Prior to 1.4.4
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Reduced Security
CVE Names: CVE-2006-4790
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Sun(sm) Alert Notification
* Sun Alert ID: 102970
* Synopsis: Security Vulnerability in RSA Signature Verification
Affects GnuTLS Library Versions Prior to 1.4.4
* Category: Security
* Product: Solaris 10 Operating System
* BugIDs: 6473089
* Avoidance: Patch
* State: Resolved
* Date Released: 21-Jun-2007
* Date Closed: 21-Jun-2007
* Date Modified:
The GnuTLS library version prior to 1.4.4 is impacted by an RSA
signature forgery vulnerability. This vulnerability, which affects
applications which make use of the GnuTLS library to verify PKCS#1
signatures, allows a malicious user to make an altered PKCS#1 v1.5
signature appear to be correct thus forging the signature.
This issue is described in the following documents:
* GNUTLS-SA-2006-4 at: http://www.gnutls.org/security.html
* CVE-2006-4790 at:
The issue described in this Sun Alert is specific to the GnuTLS
library. Multiple Sun products are affected by this issue. For more
details please see Sun Alert 102648 at:
Note: Evolution uses the GnuTLS library and is impacted by this issue.
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 10 without patch 123938-01
* Solaris 10 without patch 123939-01
Note 1: Solaris 8 and Solaris 9 are not impacted by this issue.
Note 2: This issue only impacts systems with SUNWgnutls installed. To
determine if this package is installed run the following command:
$ pkginfo SUNWgnutls
EVO146 SUNWgnutls GNU Transport Layer Security Library
Note 3: This issue only affects the GnuTLS library versions prior to
1.4.4. To determine the version of the GnuTLS library on the system
the following command can be run:
$ pkginfo -l SUNWgnutls | grep VERSION
Note 4: The Solaris 10 patches which address this issue do not
increment the version of GnuTLS. The version of GnuTLS supplied with
the patches will still be reported as 0.9.5.
There are no predictable symptoms that would indicate the described
issue has been exploited.
There is no workaround for this issue.
This issue is addressed in the following releases:
* Solaris 10 with patch 123938-01 or later
* Solaris 10 with patch 123939-01 or later
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,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
notification may only be used for the purposes contemplated by these
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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