SuSE Security Announcement: Package: kernel < 2.2.15

Date: Wed, 17 May 2000 20:50:25 +0200 (MEST)
From: Marc Heuse marc@suse.de
Subject: [suse-security-announce] SuSE Security Announcement –

                        SuSE Security Announcement

        Package: kernel < 2.2.15
        Date:    Wed, 17 May 2000 18:24:50 GMT

        Affected SuSE versions: 6.1 - 6.4
        Vulnerability Type:     bypass ipchains filter rules
                                denial of service
        SuSE default package:   yes
        Other affected systems: all linux versions using kernel 2.2.x and
                                several stateful firewall packages

A security hole was discovered in the package mentioned above.
Please update as soon as possible or disable the service if you are
using this software on your SuSE Linux installation(s).

Other Linux distributions or operating systems might be affected
as well, please contact your vendor for information about this

Please note that we provide this information on an “as-is” basis
only. There is no warranty whatsoever and no liability for any
direct, indirect or incidental damage arising from this information
or the installation of the update package.

1. Problem Description

The masquerading feature in the Linux kernel has got a
vulnerability in the udp and ftp masquerading code which allows
arbitary backward connections to be opened. Some denial of service
were found.

2. Impact

Remote users may bypass ipchains filter rules protecting the
internal network. Users can crash the machine.

3. Solution

Update the package from our FTP server. Please note that we
provide a patched 2.2.14 kernel to ensure stability and not the
2.2.15 kernel.

Please verify these md5 checksums of the updates before installing:
(NOTE: the 6.4 updates fit 6.1 to 6.3 as well)

765e268875a7716f681c14389a1c9b9b ftp://ftp.suse.com/pub/suse/i386/update/6.4/kernel/k_deflt.rpm 
be6ee213f0cafd4dac5c51a2a8d100f0 ftp://ftp.suse.com/pub/suse/i386/update/6.4/kernel/k_eide.rpm 
b900eb9f47c94df5cc15721e5f96a58e ftp://ftp.suse.com/pub/suse/i386/update/6.4/kernel/k_i386.rpm 
37deca6ee856c3242a13c2a24f32fc7f ftp://ftp.suse.com/pub/suse/i386/update/6.4/d1/lx_suse-2.2.14.SuSE-24.i386.rpm 

You can find updates on our ftp-Server:

for Intel processors
for Alpha processors

or try the following web pages for a list of mirrors:

Our webpage for patches:

Our webpage for security announcements:

If you want to report vulnerabilities, please contact security@suse.de

SuSE has got two free security mailing list services to which any
interested party may subscribe:

suse-security@suse.com  - moderated and for general/linux/SuSE                                  
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