Date: Fri, 29 Mar 2002 11:56:23 -0800
From: [email protected]
To: [email protected], [email protected],
Subject: Security Update: [CSSA-2002-012.0] Linux: OpenSSH channel code vulnerability
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To: [email protected][email protected] security-alerts@li=
nuxsecurity.com
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Caldera International, Inc. Security Advisory
Subject: Linux: OpenSSH channel code vulnerability
Advisory number: CSSA-2002-012.0
Issue date: 2002, March 28
Cross reference:
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1. Problem Description
A bug exists in the channel code of OpenSSH versions 2.0 though 3.0.2.
Existing users can use this bug to gain root privileges. The ability
to exploit this vulnerability without an existing user account has not
yet been proven, but it is considered possible. A malicious ssh server
could also use this bug to exploit a connecting vulnerable client.
2. Vulnerable Supported Versions
System Package
-----------------------------------------------------------
OpenLinux Server 3.1 All packages previous to =20
openssh-2.9p2 =20
=20
OpenLinux Workstation 3.1 All packages previous to =20
openssh-2.9p2 =20
=20
OpenLinux Server 3.1.1 All packages previous to =20
openssh-2.9.9p2 =20
=20
OpenLinux Workstation All packages previous to =20
3.1.1 openssh-2.9.9p2 =20
=20
3. Solution
Workaround
none
The proper solution is to upgrade to the latest packages.
4. OpenLinux 3.1 Server
4.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS
4.2 Verification
f628846edca7e40cebf0174d4a02abb9 RPMS/openssh-2.9p2-5.i386.rpm
=20
4.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-5.i386.rpm
=20
5. OpenLinux 3.1 Workstation
5.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/=
RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/=
SRPMS
5.2 Verification
f628846edca7e40cebf0174d4a02abb9 RPMS/openssh-2.9p2-5.i386.rpm
=20
5.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-5.i386.rpm
=20
6. OpenLinux 3.1.1 Server
6.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/SRP=
MS
6.2 Verification
523a21268ec04feb84feaf8a8b41bb3c RPMS/openssh-2.9.9p2-3.i386.rpm
=20
6.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9.9p2-3.i386.rpm
=20
7. OpenLinux 3.1.1 Workstation
7.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/curren=
t/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/curren=
t/SRPMS
7.2 Verification
523a21268ec04feb84feaf8a8b41bb3c RPMS/openssh-2.9.9p2-3.i386.rpm
=20
7.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9.9p2-3.i386.rpm
=20
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 sr861333, fz520313,
erg711982.
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 International products.
10. Acknowledgements
Joost Pol <[email protected]> discovered and researched this vulnerability.
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