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TLSA2000020-1.txt
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TurboLinux Security Announcement
Package: netscape-communicator 4.74 and earlier
Date: Thursday August 31 11:45 PDT 2000
Affected TurboLinux versions: 6.0.5 and earlier
TurboLinux Advisory ID#: TLSA2000020-1
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A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as possible.
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1. Problem Summary
There is a serious problem in netscape's java libraries that allows
an applet to act as a web server on the client machine, exposing
all files on the machine to the world.
The exploit of this vulnerability is widely published under the name
"Brown Orifice".
This update also contains fixes a buffer overrun condition while
processing JPEG files. This bug could also be exploited by
malicious web servers to obtain access to the client machine.
2. Impact
It is possible for the browser to act as a web server for the client's
entire machine and can also allow access into the client machine
via a buffer overrun condition.
3. Solution
Update the package from our ftp server by running the following command
for then package:
rpm -Uvh --nodeps --Force ftp_path_to_filename
Where ftp_path_to_filename is the following:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/netscape-communicator-4.75-1.i386.rpm
The source RPM can be downloaded here:
ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/netscape-communicator-4.75-1.src.rpm
**Note: You must rebuild and install the RPM if you choose to download
and install the SRPM. Simply installing the SRPM alone WILL NOT CLOSE
THE SECURITY HOLE.
Please verify the MD5 checksum of the update before you install:
MD5 sum Package Name
---------------------------------------------------------------------------
c99bfe042efb64bac1e9838d57ef7bd5 netscape-communicator-4.75-1.i386
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These packages are GPG signed by Turbolinux for security. Our key
is available here:
http://www.turbolinux.com/security/tlgpgkey.asc
To verify a package, use the following command:
rpm --checksig name_of_rpm
To examine only the md5sum, use the following command:
rpm --checksig --nogpg name_of_rpm
**Note: Checking GPG keys requires RPM 3.0 or higher.
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You can find more updates on our ftp server:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/ for TL6.0 Workstation
and Server security updates
ftp://ftp.turbolinux.com/pub/updates/4.0/security/ for TL4.0 Workstation
and Server security updates
Our webpage for security announcements:
http://www.turbolinux.com/security
If you want to report vulnerabilities, please contact:
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TL-security - A moderated list for discussing security issues in TurboLinux
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Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security
TL-security-announce - An announce-only mailing list for security updates
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