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

SecurityTracker
Archives


 


Category:   Application (Security)  >   OpenSSL Vendors:   OpenSSL.org
(OpenBSD Issues Fix) OpenSSL SSL/TLS Handshade Flaws May Let Remote Users Crash OpenSSL-based Applications
SecurityTracker Alert ID:  1009474
SecurityTracker URL:  http://securitytracker.com/id/1009474
CVE Reference:   CVE-2004-0079, CVE-2004-0081, CVE-2004-0112   (Links to External Site)
Date:  Mar 17 2004
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.6c - 0.9.6k and 0.9.7a - 0.9.7c
Description:   Some vulnerabilities were reported in OpenSSL, primarily involving the processing of SSL/TLS protocol handshakes. A remote user can cause OpenSSL to crash.

It is reported that there is a null-pointer assignment in the do_change_cipher_spec() function [CVE: CVE-2004-0079]. A remote user can perform a specially crafted SSL/TLS handshake with a target server to cause OpenSSL to crash on the target system. This may cause the application using OpenSSL to crash.

All versions of OpenSSL from 0.9.6c to 0.9.6k inclusive and from 0.9.7a to 0.9.7c inclusive are reportedly vulnerable to this null-pointer bug.

It is also reported that there is a flaw in performing SSL/TLS handshakes using Kerberos ciphersuites [CVE: CVE-2004-0112]. A remote user can perform a specially crafted SSL/TLS handshake against a server that is using Kerberos ciphersuites to cause OpenSSL to crash on the target system.

OpenSSL versions 0.9.7a, 0.9.7b, and 0.9.7c are reported to be vulnerable to this Kerberos handshake bug.

It is also reported that a remote user may be able to cause OpenSSL to enter an infinite loop due to a flaw in a patch introduced in 0.9.6d [CVE: CVE-2004-0081].

The vendor credits Dr. Stephen Henson of the OpenSSL core team as well as Codenomicon for supplying their TLS Test Tool and Joe Orton of Red Hat for performing the majority of the testing.

Impact:   A remote user can cause OpenSSL to crash, which may cause an application using OpenSSL to crash. The specific impact depends on the application that uses the OpenSSL library.
Solution:   OpenBSD has released a fix in the OpenBSD-current as well as the 3.4-stable and 3.3-stable branches.

Patches are also available at:

ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/016_openssl.patch
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/common/021_openssl.patch

Vendor URL:  www.openssl.org/news/secadv_20040317.txt (Links to External Site)
Cause:   Boundary error, Exception handling error, State error
Underlying OS:  UNIX (OpenBSD)
Underlying OS Comments:  3.3, 3.4

Message History:   This archive entry is a follow-up to the message listed below.
Mar 17 2004 OpenSSL SSL/TLS Handshade Flaws May Let Remote Users Crash OpenSSL-based Applications



 Source Message Contents

Subject:  OpenSSL NULL-pointer dereference vulnerability


A missing check for a NULL-pointer dereference has been found in
the OpenSSL library.  A remote attacker can use the bug against a
server to cause the OpenSSL application to crash.  This may lead
to a denial of service.

The problem is fixed in OpenBSD-current as well as the 3.4-stable
and 3.3-stable branches.

Patches are available from:
    ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/016_openssl.patch
    ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/common/021_openssl.patch

For more information, see:
    http://www.openssl.org/news/secadv_20040317.txt


 
 


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