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[SA11193] SSH Tectia Server ssh-passwd-plugin Private Host Key Exposure

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Mar 23 2004 - 14:35:55 CST

TITLE:
SSH Tectia Server ssh-passwd-plugin Private Host Key Exposure

SECUNIA ADVISORY ID:
SA11193

VERIFY ADVISORY:
http://secunia.com/advisories/11193/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

SOFTWARE:
SSH Tectia Server 4.x

DESCRIPTION:
A vulnerability has been discovered in SSH Tectia Server, which can
be exploited by malicious, authenticated users to gain knowledge of
sensitive information.

A race condition in the ssh-passwd-plugin, which is used for changing
users' passwords during user authentication if they have expired, can
be exploited to gain knowledge of the system's private host keys.

The vulnerability affects versions 4.0.3 and 4.0.4 for Unix.

NOTE: The affected plugin is not enabled by default.

SOLUTION:
Update to version 4.0.5.
http://www.ssh.com/support/downloads/tectia-server-unix/

Also remember to regenerate host keys if the
"AuthPassword.ChangePlugin" option was enabled on a vulnerable
version.

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
http://www.ssh.com/company/newsroom/article/520/

OTHER REFERENCES:
US-CERT VU#814198:
http://www.kb.cert.org/vuls/id/814198

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