SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(OpenBSD Issues Fix) OpenSSL Signature Validation Flaw Lets Remote Users Bypass Validation Checks
SecurityTracker Alert ID:  1021550
SecurityTracker URL:  http://securitytracker.com/id/1021550
CVE Reference:   CVE-2008-5077   (Links to External Site)
Date:  Jan 9 2009
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.9.8j
Description:   A vulnerability was reported in OpenSSL. A remote user can bypass digital signature validation.

The software does not properly check the results of the EVP_VerifyFinal() function. As a result, a remote server can supply a specially crafted invalid signature on a certificate that will be detected as a valid certificate. Signature checks on DSA and ECDSA keys used with SSL/TLS are affected.

Clients that connect to servers using RSA keys are not affected.

Client certificate validation is not affected.

The Google Security Team reported this vulnerability.

Impact:   A remote user can bypass certificate validation.
Solution:   OpenBSD has issued source code patches.

ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.4/common/007_openssl.patch

ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.3/common/007_openssl.patch

The OpenBSD advisory is available at:

http://www.openbsd.org/errata43.html
http://www.openbsd.org/errata44.html

Vendor URL:  www.openssl.org/news/secadv_20090107.txt (Links to External Site)
Cause:   Authentication error
Underlying OS:  UNIX (OpenBSD)
Underlying OS Comments:  4.3, 4.4

Message History:   This archive entry is a follow-up to the message listed below.
Jan 7 2009 OpenSSL Signature Validation Flaw Lets Remote Users Bypass Validation Checks



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, SecurityGlobal.net LLC