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______________________________________________________________________________
Caldera Systems, Inc. Security Advisory
Subject: wu-ftpd vulnerability
Advisory number: CSSA-2000-020.0
Issue date: 2000 June, 23
Cross reference:
______________________________________________________________________________
1. Problem Description
There is a problem in wu-ftpd handling of the SITE EXEC command
that allows remote attackers to gain root access.
This attack is possible in the default configuration of the wu-ftpd
we are shipping for all ftp users, including the anonymous user.
We urge our users to upgrade to the fixed version of wu-ftpd.
2. Vulnerable Versions
System Package
-----------------------------------------------------------
OpenLinux Desktop 2.3 All packages previous to
wu-ftpd-2.5.0-7
OpenLinux eServer 2.3 All packages previous to
and OpenLinux eBuilder wu-ftpd-2.5.0-7
OpenLinux eDesktop 2.4 All packages previous to
wu-ftpd-2.5.0-7
3. Solution
Workaround:
If you do not need wu-ftpd, deinstall it running following command as root:
rpm -e wu-ftpd
The proper solution is to upgrade to the fixed packages.
4. OpenLinux Desktop 2.3
4.1 Location of Fixed Packages
The upgrade packages can be found on Caldera's FTP site at:
ftp://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/SRPMS
4.2 Verification
ddc86702f33d6a5edddab258ddd72195 RPMS/wu-ftpd-2.5.0-7.i386.rpm
8090110ecef8d1efd2fe4c279f209e29 SRPMS/wu-ftpd-2.5.0-7.src.rpm
4.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -F wu-ftpd-2.5.0-7.i386.rpm
5. OpenLinux eServer 2.3 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.calderasystems.com/pub/updates/eServer/2.3/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/eServer/2.3/current/SRPMS
5.2 Verification
f909e8b47ec6780109c2437cdfdc2497 RPMS/wu-ftpd-2.5.0-7.i386.rpm
8354edf2f90e59aa96d8baf1d77e28a0 SRPMS/wu-ftpd-2.5.0-7.src.rpm
5.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -F wu-ftpd-2.5.0-7.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.calderasystems.com/pub/updates/eDesktop/2.4/current/RPMS/
The corresponding source code package can be found at:
ftp://ftp.calderasystems.com/pub/updates/eDesktop/2.4/current/SRPMS
6.2 Verification
d2df4fb386d65387039f33538571d907 RPMS/wu-ftpd-2.5.0-7.i386.rpm
13313d25d6d93dd98dd94e62d48c711c SRPMS/wu-ftpd-2.5.0-7.src.rpm
6.3 Installing Fixed Packages
Upgrade the affected packages with the following commands:
rpm -F wu-ftpd-2.5.0-7.i386.rpm
7. References
This and other Caldera security resources are located at:
http://www.calderasystems.com/support/security/index.html
This security fix closes Caldera's internal Problem Report 6922.
8. Disclaimer
Caldera Systems, 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.
9. Acknowledgements
Caldera Systems wishes to thank Daniel Jacobowitz for providing
patches to the problem.
______________________________________________________________________________
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From mail@mail.redhat.com Jun 17:54:31 2000 -0400
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Subject: [RHSA-2000:037-05] New Linux kernel fixes security bug
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Date: Mon, 26 Jun 2000 17:54 -0400
---------------------------------------------------------------------
Red Hat, Inc. Security Advisory
Synopsis: New Linux kernel fixes security bug
Advisory ID: RHSA-2000:037-05
Issue date: 2000-06-20
Updated on: 2000-06-26
Product: Red Hat Linux
Keywords: capabilities setuid suid agpgart 810 aacraid 3x90x MegaRAID
Acenic
Cross references: N/A
---------------------------------------------------------------------
1. Topic:
This new kernel release fixes a security hole that could
affect any setuid program on the system. In addition,
several accumulated fixes are included.
[Update 21 June: Added pointer to instructions for updating the kernel]
2. Relevant releases/architectures:
Red Hat Linux 6.0 - sparcv9 alpha sparc64 i686 i586 i386 sparc
Red Hat Linux 6.1 - i686 i586 i386 sparcv9 alpha sparc64 sparc
Red Hat Linux 6.2 - sparcv9 alpha sparc64 i686 i586 i386 sparc
3. Problem description:
A security bug involving setuid programs is fixed in
this kernel.
Added or updated drivers include:
Updated AMI MegaRAID driver
Updated Acenic Gigabit Ethernet driver
Added Adaptec RAID (aacraid) driver
Updated to latest 3c90x driver from 3Com
Updated agpgart handling for latest Intel 810 chipset
Updated SCSI error handling
An error case in raw I/O handling was fixed.
4. Solution:
Upgrade to kernel-2.2.16-3.
The procedure for upgrading the kernel is documented at:
http://www.redhat.com/support/docs/howto/kernel-upgrade/kernel-upgrade.html
Please read the directions for your architecture carefully before proceeding
with the kernel upgrade.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
11998 - Local root vulnerability in the kernel capabilities feature
6. RPMs required:
Red Hat Linux 6.2:
alpha:
ftp://updates.redhat.com/6.2/alpha/kernel-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-headers-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-source-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-doc-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-utils-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-smp-2.2.16-3.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/kernel-BOOT-2.2.16-3.alpha.rpm
sparc64:
ftp://updates.redhat.com/6.2/sparc64/kernel-2.2.16-3.sparc64.rpm
ftp://updates.redhat.com/6.2/sparc64/kernel-smp-2.2.16-3.sparc64.rpm
ftp://updates.redhat.com/6.2/sparc64/kernel-BOOT-2.2.16-3.sparc64.rpm
i686:
ftp://updates.redhat.com/6.2/i686/kernel-2.2.16-3.i686.rpm
ftp://updates.redhat.com/6.2/i686/kernel-smp-2.2.16-3.i686.rpm
i586:
ftp://updates.redhat.com/6.2/i586/kernel-2.2.16-3.i586.rpm
ftp://updates.redhat.com/6.2/i586/kernel-smp-2.2.16-3.i586.rpm
i386:
ftp://updates.redhat.com/6.2/i386/kernel-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-headers-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-source-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-doc-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-utils-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-smp-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-BOOT-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-pcmcia-cs-2.2.16-3.i386.rpm
ftp://updates.redhat.com/6.2/i386/kernel-ibcs-2.2.16-3.i386.rpm
sparc:
ftp://updates.redhat.com/6.2/sparc/kernel-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-headers-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-source-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-doc-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-utils-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-smp-2.2.16-3.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/kernel-BOOT-2.2.16-3.sparc.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/kernel-2.2.16-3.src.rpm
7. Verification:
MD5 sum Package Name
--------------------------------------------------------------------------
7135cd70a5b0896574a38363867637e2 6.2/SRPMS/kernel-2.2.16-3.src.rpm
8d2d1a5312c847a422633abde5178733 6.2/alpha/kernel-2.2.16-3.alpha.rpm
358b77b381dcf7e6e95e181eb271f368 6.2/alpha/kernel-BOOT-2.2.16-3.alpha.rpm
3306014cf0d5d3cd6aaf3eb7b495c786 6.2/alpha/kernel-doc-2.2.16-3.alpha.rpm
89e60b43d47202dc7a237e287b60a39f 6.2/alpha/kernel-headers-2.2.16-3.alpha.rpm
6a166b661bc6e6b078d111c2a18ef1bf 6.2/alpha/kernel-smp-2.2.16-3.alpha.rpm
88f53a2105dbf03801b10abc1ddfbbd8 6.2/alpha/kernel-source-2.2.16-3.alpha.rpm
51914ffb09fbe7df6d12a10f713f0b0a 6.2/alpha/kernel-utils-2.2.16-3.alpha.rpm
f639d81c76c4a35332f3f4b8bae40b0c 6.2/i386/kernel-2.2.16-3.i386.rpm
08aa0ee0e630c0b740bca1eb630b598c 6.2/i386/kernel-BOOT-2.2.16-3.i386.rpm
e6de480a599e9b4faa7cceab4ed73ce9 6.2/i386/kernel-doc-2.2.16-3.i386.rpm
438d3cfcf28ca7beb39a94b4bd438cec 6.2/i386/kernel-headers-2.2.16-3.i386.rpm
2b5026d45dc07324324dcb4cf936afe4 6.2/i386/kernel-ibcs-2.2.16-3.i386.rpm
dcdf1ba8a2154b15789a3f660c71c166 6.2/i386/kernel-pcmcia-cs-2.2.16-3.i386.rpm
94a8f4a294d743b78078274ef30722b8 6.2/i386/kernel-smp-2.2.16-3.i386.rpm
409750698f4d7a21ba3527880c2017fe 6.2/i386/kernel-source-2.2.16-3.i386.rpm
4a7bb771616f294803342e71912a2847 6.2/i386/kernel-utils-2.2.16-3.i386.rpm
3d8a9d1f0c9d8b12b4e1177ea406825d 6.2/i586/kernel-2.2.16-3.i586.rpm
b672635137d91dd7142735749a401d0b 6.2/i586/kernel-smp-2.2.16-3.i586.rpm
a1f393d785a0f6d5e95de3ed7db9f24d 6.2/i686/kernel-2.2.16-3.i686.rpm
639811c51a7896a21d995616c126ca07 6.2/i686/kernel-smp-2.2.16-3.i686.rpm
4deba2b9f3285d63b96daef2bcd599e4 6.2/sparc/kernel-2.2.16-3.sparc.rpm
514d9ce2b85ec5954bf47e609a7f2048 6.2/sparc/kernel-BOOT-2.2.16-3.sparc.rpm
d776ec3b12207a7122e13c802102b731 6.2/sparc/kernel-doc-2.2.16-3.sparc.rpm
43fc3b6f6c71b232407c6099f444d9e8 6.2/sparc/kernel-headers-2.2.16-3.sparc.rpm
3c509252e3d9a681afc2598ad28a688a 6.2/sparc/kernel-smp-2.2.16-3.sparc.rpm
0839ab7161bc75b40b09a0bbf7625a74 6.2/sparc/kernel-source-2.2.16-3.sparc.rpm
a9d8ebf3009225593ca63e9d587bd123 6.2/sparc/kernel-utils-2.2.16-3.sparc.rpm
3cbfa4033d7a1fa10c0212595438dc36 6.2/sparc64/kernel-2.2.16-3.sparc64.rpm
3f0544a200923506293f26c977d7865e 6.2/sparc64/kernel-BOOT-2.2.16-3.sparc64.rpm
68e67de6ca536719893fe8fb0d401561 6.2/sparc64/kernel-smp-2.2.16-3.sparc64.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig <filename>
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg <filename>
8. References:
N/A