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Category:   Application (VPN)  >   OpenSSH Vendors:   OpenSSH.org
OpenSSH May Unexpectedly Activate GatewayPorts and Also May Disclose GSSAPI Credentials in Certain Cases
SecurityTracker Alert ID:  1014845
SecurityTracker URL:  http://securitytracker.com/id/1014845
CVE Reference:   CVE-2005-2797, CVE-2005-2798   (Links to External Site)
Updated:  Jan 10 2006
Original Entry Date:  Sep 2 2005
Impact:   Disclosure of authentication information, Host/resource access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.2
Description:   Two vulnerabilities were reported in OpenSSH. GatewayPorts may be unexpectedly activated. GSSAPI authentication credentials may be disclosed to untrusted remote users.

If no listen address is specified for dynamic port forwardings (forwarding with the '-D' flag), GatewayPorts may be incorrectly activated. As a result, a remote user may be able to access ports on the target system. This flaw was introduced in OpenSSH version 4.0.

GSSAPI credentials can be delegated to users that can request to login with authentication methods other than GSSAPI authentication. As a result, credentials may be inadvertently exposed to untrusted remote users in certain situations.

Impact:   GatewayPorts may be unexpectedly activated.

GSSAPI authentication credentials may be disclosed to untrusted remote users.

Solution:   The vendor has released a fixed version (4.2), available at:

http://openssh.org/

Vendor URL:  www.openssh.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 5 2005 (Red Hat Issues Fix) OpenSSH May Unexpectedly Activate GatewayPorts and Also May Disclose GSSAPI Credentials in Certain Cases
Red Hat has released a fix for Red Hat Enterprise Linux 4.
Jan 10 2006 (HP Issues Fix for HP-UX Secure Shell) OpenSSH May Unexpectedly Activate GatewayPorts and Also May Disclose GSSAPI Credentials in Certain Cases
HP has issued a fix for HP-UX Secure Shell.
Jun 7 2006 (HP Issues Fix for HP-UX) OpenSSH May Unexpectedly Activate GatewayPorts and Also May Disclose GSSAPI Credentials in Certain Cases
HP has issued a fix for HP-UX.



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