drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Problem in OpenSSH, wenn UseLogin eingeschaltet ist
Name: |
Problem in OpenSSH, wenn UseLogin eingeschaltet ist
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ID: |
CSSA-2001-042.0 |
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Distribution: |
Caldera |
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Plattformen: |
Caldera eDesktop 2.4, Caldera eBuilder, Caldera eServer 2.3.1, Caldera Server 3.1, Caldera Workstation 3.1 |
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Datum: |
Fr, 14. Dezember 2001, 12:00 |
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Referenzen: |
Keine Angabe |
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Applikationen: |
Portable OpenSSH |
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Originalnachricht |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
______________________________________________________________________________ Caldera International, Inc. Security Advisory
Subject: Linux - Remote vulnerability in OpenSSH Advisory number: CSSA-2001-042.0 Issue date: 2001, December 11 Cross reference: ______________________________________________________________________________
1. Problem Description
The OpenSSH team has reported a vulnerability in the OpenSSH server that allows remote attackers to obtain root privilege if the server has the UseLogin option enabled. This option is off by default on OpenLinux, so a default installation is not vulnerable.
We nevertheless recommend to our customers to upgrade to the fixed package.
Exploits of this vulnerability have apparently been circulated for some time.
2. Vulnerable Versions
System Package ----------------------------------------------------------- OpenLinux 2.3 not vulnerable OpenLinux eServer 2.3.1 All packages previous to and OpenLinux eBuilder openssh-2.9p2-4 OpenLinux eDesktop 2.4 All packages previous to openssh-2.9p2-4 OpenLinux Server 3.1 All packages previous to openssh-2.9p2-4 OpenLinux Workstation 3.1 All packages previous to openssh-2.9p2-4
3. Solution
Workaround
Make sure that you do not have the UseLogin option enabled. In /etc/ssh/sshd_config, the UseLogin option should either be commended out, or should be set to "no".
The proper solution is to upgrade to the latest packages.
4. OpenLinux 2.3
not vulnerable
5. OpenLinux eServer 2.3.1 and OpenLinux eBuilder for ECential 3.0
5.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/eServer/2.3/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/eServer/2.3/current/SRPMS
5.2 Verification
4750b4dc110bcdb9a06f275422486d22 RPMS/openssh-2.9p2-4.i386.rpm 2ccef9bbd5c51ac9ee3ea7bdb0cad5e8 RPMS/openssh-askpass-2.9p2-4.i386.rpm db4931cfa21ef0312ca9f7baaea9d19d RPMS/openssh-server-2.9p2-4.i386.rpm 50511f127c8215bce46d6082aa924aa9 SRPMS/openssh-2.9p2-4.src.rpm
5.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-4.i386.rpm \ openssh-askpass-2.9p2-4.i386.rpm \ openssh-server-2.9p2-4.i386.rpm
6. OpenLinux eDesktop 2.4
6.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.caldera.com/pub/updates/eDesktop/2.4/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/eDesktop/2.4/current/SRPMS
6.2 Verification
67227fa9552a81465786e23b82347b7b RPMS/openssh-2.9p2-4.i386.rpm 80693bc40f533ed757a2cc3aa7ad2dbc RPMS/openssh-askpass-2.9p2-4.i386.rpm 3cbd5f69eb010de1dad17c25b85bcc6f RPMS/openssh-server-2.9p2-4.i386.rpm 50511f127c8215bce46d6082aa924aa9 SRPMS/openssh-2.9p2-4.src.rpm
6.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-4.i386.rpm \ openssh-askpass-2.9p2-4.i386.rpm \ openssh-server-2.9p2-4.i386.rpm
7. OpenLinux 3.1 Server
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/Server/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS
7.2 Verification
2b214778e58a252b5fa6efda93564ec9 RPMS/openssh-2.9p2-4.i386.rpm a7cbe46794f3e2ccd9db54844d6500a2 RPMS/openssh-askpass-2.9p2-4.i386.rpm eb5f164e76adf62b19d8d7ce8bd4e121 RPMS/openssh-server-2.9p2-4.i386.rpm 50511f127c8215bce46d6082aa924aa9 SRPMS/openssh-2.9p2-4.src.rpm
7.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-4.i386.rpm \ openssh-askpass-2.9p2-4.i386.rpm \ openssh-server-2.9p2-4.i386.rpm
8. OpenLinux 3.1 Workstation
8.1 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:
SRPMS
8.2 Verification
2b214778e58a252b5fa6efda93564ec9 RPMS/openssh-2.9p2-4.i386.rpm a7cbe46794f3e2ccd9db54844d6500a2 RPMS/openssh-askpass-2.9p2-4.i386.rpm eb5f164e76adf62b19d8d7ce8bd4e121 RPMS/openssh-server-2.9p2-4.i386.rpm 50511f127c8215bce46d6082aa924aa9 SRPMS/openssh-2.9p2-4.src.rpm
8.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh openssh-2.9p2-4.i386.rpm \ openssh-askpass-2.9p2-4.i386.rpm \ openssh-server-2.9p2-4.i386.rpm
9. References
This and other Caldera security resources are located at:
http://www.caldera.com/support/security/index.html
This security fix closes Caldera's internal Problem Report 11153.
10. 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 OpenLinux.
11. Acknowledgements
Caldera wishes to thank Markus Friedl of the OpenSSH team for notifying vendor-sec. ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: Weitere Infos: siehe http://www.gnupg.org
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