Date: Wed, 2 Aug 2000 13:34:36 -0700 (PDT)
From: Joe Little jlittle@turbolinux.com
To: tl-security-announce@turbolinux.com
Subject: [TL-Security-Announce] netscape TLSA2000017-1
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TurboLinux Security Announcement
Package: netscape-4.73 and earlier
Date: Wednesday August 2 12:00 PDT 2000
Affected TurboLinux versions: 6.0.5 and earlier
Vulnerability Type: malicious remote website exploit possible
TurboLinux Advisory ID#: TLSA2000017-1
Credits: netscape.ad-1.00-07
A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as possible
or disable the service.
1. Problem Summary
Current and previous versions of netscape communicator have a
buffer overflow condition in its handling of JPEG files.
Specifically, it trusts the purported length of JPEG files provided
by the header and can be mislead into reading arbitrary amounts of
data, leading to the overwriting of memory.
2. Impact
A web site could contain malicious code which would enable
remote execution or other malicious behavior as the user of
netscape on the client’s machine.
3. Solution
Please upgrade your packages to match the new revision
Update the packages from our ftp server by running the following
command:
rpm -Fv ftp_path_to_filename
Where ftp_path_to_filename is the following:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/netscape-communicator-4.74-2.i386.rpm
The source RPM can be downloaded here:
ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/netscape-communicator-4.74-2.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
940ec5bccc73166938e1b75cb384de19 netscape-communicator-4.74-2.i386.rpm dcc0a1890e0123efd3cd86efbc276942 netscape-communicator-4.74-2.src.rpm
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.
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:
Subscribe to the TurboLinux Security Mailing lists:
TL-security – A moderated list for discussing security issues in
TurboLinux products.
Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security
TL-security-announce – An announce-only mailing list for
security updates and alerts. Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security-announce
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