Date: Wed, 23 Aug 2000 03:54:09 +0200 (MEST)
From: Roman Drahtmueller draht@suse.de
To: suse-security-announce@suse.de
Subject: [suse-security-announce] SuSE Security Announcement: Netscape
-----BEGIN PGP SIGNED MESSAGE-----
SuSE Security Announcement
Package: Netscape, Versions 4.x, possibly others
Date: Wednesday, August 23rd, 2000 03:30 MEST
Affected SuSE versions: All
Vulnerability Type: remote file viewing, remote buffer overflow
Severity (1-10): 4, 7
SuSE default package: yes
Other affected systems: all linux systems using this package
Content of this advisory:
1) security vulnerability resolved: Netscape
problem description, discussion, solution and upgrade information
2) Correction/apology for perl thread, pending vulnerabilities,
temporary workarounds
3) standard appendix (further information)
1) problem description, brief discussion, solution, upgrade information
Two security problems exist in the netscape package as shipped with
SuSE Linux distributions.
a) Improper verification in Netscape's jpeg processing code can lead
to a buffer overflow where data read from the network can overwrite
memory. As a result, arbitrary code from a remote origin could be
executed. The attack is particularly dangerous since it can penetrate
firewall setups. Netscape version 4.74 fixes (fixed) this
vulnerability.
b) Due to an error in the java implementation in Netscape, it is
possible for an attacker to view files and directories with the
priviledges of the user running Netscape if the user visits a
malisciously crafted webpage. This issue is known as "Brown
Orifice" and requires the user to have Java enabled in her browser
configuration. Again, this attack can penetrate firewall setups.
See http://www.brumleve.com/BrownOrifice for details.
Problem a) can be circumvented by disabling the automatic image
loading in Netscape's configuration.
The temporary workaround for problem b) is to disable Java in
Netscape's configuration menu (to protect against other
vulnerabilities, disable JavaScript, too!). Both countermeasures
may widely be found inacceptable.
SuSE provides an updated package for the vulnerable software. It is
strongly recommended to upgrade to the latest version found on our
ftp server as described below. The update package introduces
Netscape version 4.75, including the SuSE-specific libraries that fix
some of Netscape's "irregular" behaviour. Please note that
Netscape-4.75 is not available for the glibc-2.0-based SuSE
Distributions SuSE-6.0 and 6.1 because Netscape doesn't provide
any files for this glibc version. For these distributions, we
provide Netscape Version 4.74 which fixes problem a) only.
Alternatively, the package for the libc5-based SuSE-5.3
distribution can be used as well if the package 'shlibs5' is
installed. This is recommended, since the 5.3 package may be
faster and more reliable.
Download the update package as described below and install the
package with the command `rpm -Fhv file.rpm'. The md5sum for each
file is in the line below. You can verify the integrity of the rpm
files using the command
`rpm
independently from the md5 signatures below.
Due to US-American export restrictions for cryptographical software,
we are unable to provide update packages on our US ftp server
ftp.suse.com. Instead, the packages can be found on ftp.suse.de. For
bandwidth reasons, please use our mirrors or our primary mirror
ftp.gwdg.de and follow the directory to your distribution.=20
Example: For SuSE-6.4 use the path
ftp://ftp.gwdg.de/pub/linux/suse/6.4_update_de/xap1/netscape.rpm.
Please note that the path to netscape.rpm in the 6.0 and 6.1 update
directories point to Netscape version 4.74 which doesn't fix problemb!
See section above!
Further mirrors can be found at
http://www.suse.de/de/support/download/ftp/inland.html, but be
advised that not all sites mirror the German part of the update
directories.
md5sums for the i386 Intel Platform (the only one supported):
SuSE Versions 6.2, 6.3, 6.4, 7.0:
70289f88b4c9fc1a9867ba7dac985982 netscape-4.75.glibc21.i386.rpm
SuSE Version 5.3 (libc5-based, probably faster, can be used on
glibc2-based systems if the package shlibs5 is installed)
679aaf67592244a07733bdabdab67729 netscape-4.75.libc5.i386.rpm
SuSE Version 6.0 and 6.1, Netscape-4.74 with incomplete fixes:
4bcc31fe37f7c8d226b437c1daa9b944 netscape-4.74.glibc20.i386.rpm
2) Correction/Apology: In my posting to suse-security@suse.de and to
bugtraq@securityfocus.com about the suidperl thread, Subject: , dated 10 Aug 2000, I wrote:
...maliciouslyinconsideratedumpable
3) standard appendix:
SuSE runs two security mailing lists to which any interested party may
subscribe:
suse-security@suse.com
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
suse-security-subscribe@suse.com.
suse-security-announce@suse.com
- SuSE's announce-only mailing list.
Only SuSE's security annoucements are sent to this list.
To subscribe, send an email to
suse-security-announce-subscribe@suse.com
For general information or the frequently asked questions (faq)
send mail to:
suse-security-info@suse.com or
suse-security-faq@suse.com respectively.
SuSE's security contact is security@suse.com
Regards,
Roman Drahtmueller.
The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way.
SuSE GmbH makes no warranties of any kind whatsoever with respect
to the information contained in this security advisory.
Type Bits/KeyID Date User ID
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