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AUSCERT External Security Bulletin Redistribution
ESB-2001.504 -- Caldera International, Inc. Security Advisory
Vulnerability in wu-ftpd
29 November 2001
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AusCERT Security Bulletin Summary
---------------------------------
Product: wu-ftpd previous to 2.6.1-13
Vendor: Caldera International
Operating System: OpenLinux 2.3
OpenLinux eServer 2.3.1
OpenLinux eBuilder
OpenLinux eDesktop 2.4
OpenLinux Server 3.1
OpenLinux Workstation 3.1
Platform: i386
Impact: Root Compromise
Access Required: Remote
Ref: AA-2001.05
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______________________________________________________________________________
Caldera International, Inc. Security Advisory
Subject: Linux - Vulnerability in wu-ftpd
Advisory number: CSSA-2001-041.0
Issue date: 2001, November 28
Cross reference:
______________________________________________________________________________
1. Problem Description
The CoreST team has discovered a vulnerability in wu-ftpd that can be
exploited to obtain root access to the FTP server.
We recommend that customers immediately upgrade to the fixed
version. If you do not need FTP service, remove the package.
2. Vulnerable Versions
System Package
-----------------------------------------------------------
OpenLinux 2.3 All packages previous to
wu-ftpd-2.6.1-13OL
OpenLinux eServer 2.3.1 All packages previous to
and OpenLinux eBuilder wu-ftpd-2.6.1-13OL
OpenLinux eDesktop 2.4 All packages previous to
wu-ftpd-2.6.1-13OL
OpenLinux Server 3.1 All packages previous to
wu-ftpd-2.6.1-13
OpenLinux Workstation 3.1 not vulnerable
3. Solution
Workaround
If you do not need wu-ftpd isntalled, remove it by running
the following command as root:
rpm -e wu-ftpd
The proper solution is to upgrade to the latest packages.
4. OpenLinux 2.3
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/2.3/current/RPMS
The corresponding source code package can be found at:
ftp://ftp.caldera.com/pub/updates/OpenLinux/2.3/current/SRPMS
4.2 Verification
d6a618f9fe6a3ae99a1c54a405ab169a RPMS/wu-ftpd-2.6.1-13OL.i386.rpm
64ee3731783c12da3a5c164acb3ed239 SRPMS/wu-ftpd-2.6.1-13OL.src.rpm
4.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh wu-ftpd-2.6.1-13OL.i386.rpm
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
a9396078593fc3e4445d3d691df484be RPMS/wu-ftpd-2.6.1-13OL.i386.rpm
64ee3731783c12da3a5c164acb3ed239 SRPMS/wu-ftpd-2.6.1-13OL.src.rpm
5.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh wu-ftpd-2.6.1-13OL.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
3edfa831ea0d3cc94f3b7a1e1bd49723 RPMS/wu-ftpd-2.6.1-13OL.i386.rpm
64ee3731783c12da3a5c164acb3ed239 SRPMS/wu-ftpd-2.6.1-13OL.src.rpm
6.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh wu-ftpd-2.6.1-13OL.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
13e54795ceba03b48c7ac4a9c7616d70 RPMS/wu-ftpd-2.6.1-13.i386.rpm
a14359f0a93b7e82d20df2c000a81b9a SRPMS/wu-ftpd-2.6.1-13.src.rpm
7.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -Fvh wu-ftpd-2.6.1-13.i386.rpm
8. OpenLinux 3.1 Workstation
not vulnerable
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 11023.
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 Core ST and Ivan Arce for their efforts to
coordinate the publication of this vulnerability with all affected
vendors.
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