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Red Hat Security Advisory: buffer overflow in slrn

Mar 15, 2001, 08:22 (0 Talkback[s])

Date: Wed, 14 Mar 2001 17:15:00 -0500
From: bugzilla@REDHAT.COM
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [RHSA-2001:028-02] buffer overflow in slrn


                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          buffer overflow in slrn
Advisory ID:       RHSA-2001:028-02
Issue date:        2001-03-09
Updated on:        2001-03-13
Product:           Red Hat Linux
Keywords:          slrn wrap overflow
Cross references:
Obsoletes:

1. Topic:

An overflow exists in the slrn pacakge as shipped in Red Hat Linux 7 and Red Hat Linux 6.x, which could possibly lead to remote users executing arbitrary code as the user running slrn.

It is recommended that all users of slrn update to the fixed packages. Users of Red Hat Linux 6.0 or 6.1 should use the packages for Red Hat Linux 6.2.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, sparc
Red Hat Linux 7.0 - alpha, i386

3. Problem description:

An overflow exists in the article wrapping code for slrn. By posting a carefully constructed article, it would be theoretically possible for a remote user to execute arbitrary code as the user running slrn.

No know *exploits* of this overflow have been reported, but articles that will cause slrn to crash do exist.

4. Solution:

To update all RPMs for your particular architecture, run:

rpm -Fvh <filenames>

where <filenames> is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directly *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

6. RPMs required:

Red Hat Linux 6.2:

SRPMS:
ftp://updates.redhat.com/6.2/SRPMS/slrn-0.9.6.4-0.6.src.rpm

alpha:
ftp://updates.redhat.com/6.2/alpha/slrn-0.9.6.4-0.6.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/slrn-pull-0.9.6.4-0.6.alpha.rpm

i386:
ftp://updates.redhat.com/6.2/i386/slrn-0.9.6.4-0.6.i386.rpm
ftp://updates.redhat.com/6.2/i386/slrn-pull-0.9.6.4-0.6.i386.rpm

sparc:
ftp://updates.redhat.com/6.2/sparc/slrn-0.9.6.4-0.6.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/slrn-pull-0.9.6.4-0.6.sparc.rpm

Red Hat Linux 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/SRPMS/slrn-0.9.6.4-0.7.src.rpm

alpha:
ftp://updates.redhat.com/7.0/alpha/slrn-0.9.6.4-0.7.alpha.rpm
ftp://updates.redhat.com/7.0/alpha/slrn-pull-0.9.6.4-0.7.alpha.rpm

i386:
ftp://updates.redhat.com/7.0/i386/slrn-0.9.6.4-0.7.i386.rpm
ftp://updates.redhat.com/7.0/i386/slrn-pull-0.9.6.4-0.7.i386.rpm

7. Verification:

MD5 sum                           Package Name

df1d6c939fae603944e709fd27eed71b 6.2/SRPMS/slrn-0.9.6.4-0.6.src.rpm
3854e2cee9e299a551d3f6a45f463f05 6.2/alpha/slrn-0.9.6.4-0.6.alpha.rpm
37dce6b561e524f16f3c54f33564cc27 6.2/alpha/slrn-pull-0.9.6.4-0.6.alpha.rpm
81479f270bf2539b665115dabbb2c3d1 6.2/i386/slrn-0.9.6.4-0.6.i386.rpm
e160f67aae0c45e533de818569a64c8d 6.2/i386/slrn-pull-0.9.6.4-0.6.i386.rpm
2d76f003a45504f55afda015f63ad0e2 6.2/sparc/slrn-0.9.6.4-0.6.sparc.rpm
40c5ed228ae52c26a1ca687b7d929177 6.2/sparc/slrn-pull-0.9.6.4-0.6.sparc.rpm
1793d468092db5b40f66b388f5e36a3b 7.0/SRPMS/slrn-0.9.6.4-0.7.src.rpm
01d6a50b5c2817066385d1621c259510 7.0/alpha/slrn-0.9.6.4-0.7.alpha.rpm
ba4c76bad2540e37f8fa5f292a2641ae 7.0/alpha/slrn-pull-0.9.6.4-0.7.alpha.rpm
dd601a7324b5589326a5d92d3d2ee27f 7.0/i386/slrn-0.9.6.4-0.7.i386.rpm
d49c0b47e967bd9abdb7fec655b8e3ff 7.0/i386/slrn-pull-0.9.6.4-0.7.i386.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:

Copyright(c) 2000, 2001 Red Hat, Inc.