WebTool-userpass May Disclose SSH User Passphrases to Certain Local Users
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SecurityTracker Alert ID: 1007805
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Sep 25 2003
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Impact: Disclosure of authentication information
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Fix Available: Yes
Exploit Included: Yes
Vendor Confirmed: Yes
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Description: A vulnerability was reported in the WebTool-userpass package. The application may disclose a target user's SSH passphrase via a log file entry.
It is reported that a local user's SSH passphrase is recorded in the /var/log/userpass.log file when the user creates an SSH key
using WebTool-userpass. The passphrase may be viewed by local users with read privileges for that file.
Guardian Digital credits
"Shawn" <ASUU.Webmaster@asuu.utah.edu> with discovering and reporting this flaw.
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Impact: A local user with read privileges for the '/var/log/userpass.log' file may be able to view a target user's SSH passphrase.
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Solution: The vendor has released a fix. Guardian Digital Secure Network subscribers can update via the Guardian Digital WebTool.
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Vendor URL: www.guardiandigital.com/ (Links to External Site)
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Cause: Access control error
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Underlying OS: Linux (Any)
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Underlying OS Comments: EnGarde Secure Community 2; EnGarde Secure Professional v1.5; Other Linux platforms may also be affected
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Reported By: EnGarde Secure Linux <security@guardiandigital.com>
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Message History:
None.
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Source Message Contents
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Date: Wed, 24 Sep 2003 09:51:41 -0400 (EDT)
From: EnGarde Secure Linux <security@guardiandigital.com>
Subject: [ESA-20030924-026] 'WebTool-userpass' passphrase disclosure
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
+------------------------------------------------------------------------+
| Guardian Digital Security Advisory September 24, 2003 |
| http://www.guardiandigital.com ESA-20030924-026 |
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| Package: WebTool-userpass |
| Summary: Passphrase disclosure vulnerability. |
+------------------------------------------------------------------------+
EnGarde Secure Linux is an enterprise class Linux platform engineered
to enable corporations to quickly and cost-effectively build a complete
and secure Internet presence while preventing Internet threats.
OVERVIEW
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"Shawn" <ASUU.Webmaster@asuu.utah.edu> discovered and reported an SSH
passphrase disclosure vulnerability in the WebTool's User Password
Changer via the engarde-users mailing list.
The Guardian Digital WebTool provides functionality allowing local users
to generate their own SSH keys. The problem lies in the fact that the
data was being passed around via an HTTP GET instead of an HTTP POST,
resulting in the users passphrase being logged in /var/log/userpass.log
along with the rest of the query string.
Guardian Digital products affected by this issue include:
EnGarde Secure Community 2
EnGarde Secure Professional v1.5
It is recommended that all users apply this update as soon as possible.
SOLUTION
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Guardian Digital Secure Network subscribers may automatically update
affected systems by accessing their account from within the Guardian
Digital WebTool.
To modify your GDSN account and contact preferences, please go to:
https://www.guardiandigital.com/account/
REFERENCES
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Guardian Digital's public key:
http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY
Guardian Digital Advisories:
http://infocenter.guardiandigital.com/advisories/
Security Contact: security@guardiandigital.com
- --------------------------------------------------------------------------
Author: Ryan W. Maple <ryan@guardiandigital.com>
Copyright 2003, Guardian Digital, Inc.
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