SSH Tectia Server Insecure File Permissions May Let Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1017913 |
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SecurityTracker URL: http://securitytracker.com/id/1017913
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CVE Reference:
CVE-2007-2063
(Links to External Site)
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Updated: May 14 2008
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Original Entry Date: Apr 16 2007
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Impact:
User access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 5.4.0
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Description:
A vulnerability was reported in SSH Tectia Server. A local user may be able to obtain elevated privileges on the target system.
The SSH Tectia Server may be run as a started task with an empty umask on some z/OS installations. As a result, some HFS files may be created with world-writable permissions.
A local user may be able to exploit this to gain elevated privileges.
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Impact:
A local user can obtain elevated privileges on the target system.
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Solution:
The vendor has issued a fixed version (5.4.0).
The SSH advisory is available at:
http://www.ssh.com/documents/33/SSH_Tectia_Server_5.4.0_zOS_releasenotes.txt
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Vendor URL: www.ssh.com/documents/33/SSH_Tectia_Server_5.4.0_zOS_releasenotes.txt (Links to External Site)
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Cause:
Access control error
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Underlying OS:
z/OS
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Message History:
None.
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Source Message Contents
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Date: Mon, 16 Apr 2007 10:29:53 -0400
Subject: Release Notes for SSH Tectia Server 5.4.0 for IBM z/OS
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http://www.ssh.com/documents/33/SSH_Tectia_Server_5.4.0_zOS_releasenotes.txt
- Server creates world-writable directories.
On some z/OS installations the server could be run as a started task
with an empty umask, which caused some created HFS files to have
insecure (world-writable) permissions.
If upgrading to this release, you must verify that the environment file
used by your sshd2 started task script (originally called SSHENV in the
SAMPLES directory) contains an appropriate _BPX_BATCH_UMASK declaration.
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