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TUCoPS :: Linux :: Discontinued :: cs2022-0.txt

OpenSSH ticket and token passing buffer overflow - Caldera Advisory CSSA-2002-022.0




To: bugtraq@securityfocus.com announce@lists.caldera.com security-alerts@linuxsecurity.com

______________________________________________________________________________

		Caldera International, Inc.  Security Advisory

Subject:		Linux: OpenSSH ticket and token passing buffer overflow
Advisory number: 	CSSA-2002-022.0
Issue date: 		2002 May 15
Cross reference:
______________________________________________________________________________


1. Problem Description

	A buffer overflow exists in OpenSSH if KerberosTgtPassing or
	AFSTokenPassing has been enabled in the sshd_config file. A
	malicious user, possibly remote, could use this vulnerability
	to gain privileged access to the system.


2. Vulnerable Supported Versions

	System				Package
	----------------------------------------------------------------------

	OpenLinux 3.1.1 Server		prior to openssh-2.9p2-6.i386.rpm
					prior to openssh-askpass-2.9p2-6.i386.rpm
					prior to openssh-server-2.9p2-6.i386.rpm

	OpenLinux 3.1.1 Workstation	prior to openssh-2.9p2-6.i386.rpm
					prior to openssh-askpass-2.9p2-6.i386.rpm

	OpenLinux 3.1 Server		prior to openssh-2.9p2-6.i386.rpm
					prior to openssh-askpass-2.9p2-6.i386.rpm
					prior to openssh-server-2.9p2-6.i386.rpm

	OpenLinux 3.1 Workstation	prior to openssh-2.9p2-6.i386.rpm
					prior to openssh-askpass-2.9p2-6.i386.rpm


3. Solution

	The proper solution is to install the latest packages.


4. OpenLinux 3.1.1 Server

	4.1 Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/RPMS

4.2 Packages

	f9a494af5e0e6a8eec419f8f94087f7e	openssh-2.9p2-6.i386.rpm
	b9fcc6352bc4c65f63cda1b0caa2b89c	openssh-askpass-2.9p2-6.i386.rpm
	ff4a5bc7e7b1d4fd3f79c647d11d9162	openssh-server-2.9p2-6.i386.rpm

	4.3 Installation

	rpm -Fvh openssh-2.9p2-6.i386.rpm
	rpm -Fvh openssh-askpass-2.9p2-6.i386.rpm
	rpm -Fvh openssh-server-2.9p2-6.i386.rpm

	4.4 Source Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/SRPMS

4.5 Source Packages

	ab3e90f4e70fc3eecd7e456fa2c2a97e	openssh-2.9p2-6.src.rpm


5. OpenLinux 3.1.1 Workstation

	5.1 Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/current/RPMS

5.2 Packages

	3406e8a3e55b52b2eb3e7644327d783c	openssh-2.9p2-6.i386.rpm
	e57817246b56ffdf0322be8afcec08ae	openssh-askpass-2.9p2-6.i386.rpm

	5.3 Installation

	rpm -Fvh openssh-2.9p2-6.i386.rpm
	rpm -Fvh openssh-askpass-2.9p2-6.i386.rpm

	5.4 Source Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/current/SRPMS

5.5 Source Packages

	fde335f6bce93b3a3bf3cc20d8231849	openssh-2.9p2-6.src.rpm


6. OpenLinux 3.1 Server

	6.1 Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/RPMS

6.2 Packages

	41f489ad60ed068a2a027589ca49e6ea	openssh-2.9p2-6.i386.rpm
	c4b8c1e011708a9e8fa04d927387bde5	openssh-askpass-2.9p2-6.i386.rpm
	3bbb580c64ba83efaeefac20d891148f	openssh-server-2.9p2-6.i386.rpm

	6.3 Installation

	rpm -Fvh openssh-2.9p2-6.i386.rpm
	rpm -Fvh openssh-askpass-2.9p2-6.i386.rpm
	rpm -Fvh openssh-server-2.9p2-6.i386.rpm

	6.4 Source Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS

6.5 Source Packages

	1c30685cf106f5ee05ec201cd55044f8	openssh-2.9p2-6.src.rpm


7. OpenLinux 3.1 Workstation

	7.1 Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/RPMS

7.2 Packages

	45502ddfa3d9bc67eefc2ec6a6bd992a	openssh-2.9p2-6.i386.rpm
	c5bedc4946ee432f66255161ba61bbf5	openssh-askpass-2.9p2-6.i386.rpm

	7.3 Installation

	rpm -Fvh openssh-2.9p2-6.i386.rpm
	rpm -Fvh openssh-askpass-2.9p2-6.i386.rpm

	7.4 Source Package Location

	ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/SRPMS

7.5 Source Packages

	5ddea2209f395da08ca715a128e5485a	openssh-2.9p2-6.src.rpm


8. References

	Specific references for this advisory:
		none


	Caldera OpenLinux security resources:
		http://www.caldera.com/support/security/index.html

Caldera UNIX security resources:
		http://stage.caldera.com/support/security/

This security fix closes Caldera incidents sr863642, fz520794
	and erg712034.


9. Disclaimer

	Caldera International, Inc. is not responsible for the misuse
	of any of the information we provide on this website and/or
	through our security advisories. Our advisories are a service
	to our customers intended to promote secure installation and
	use of Caldera products.


10. Acknowledgements

	Marcell Fodor discovered and researched this vulnerability.


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