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Red Hat Linux Advisory: tcpdump

May 30, 2002, 16:59 (0 Talkback[s])

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                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated tcpdump packages fix buffer overflow
Advisory ID:       RHSA-2002:094-08
Issue date:        2002-05-17
Updated on:        2002-05-29
Product:           Red Hat Linux
Keywords:          tcpdump arpwatch buffer overflow
Cross references:  
Obsoletes:         RHSA-2001:089-10
CVE Names:         CAN-2002-0380

1. Topic:

Updated tcpdump, libpcap, and arpwatch packages are available for Red
Hat Linux 6.2 and 7.x. These updates close a buffer overflow when handling
NFS packets.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, sparc

Red Hat Linux 7.0 - alpha, i386

Red Hat Linux 7.1 - alpha, i386, ia64

Red Hat Linux 7.2 - i386, ia64, s390

3. Problem description:

tcpdump is a command-line tool for monitoring network traffic.  Versions of
tcpdump up to and including 3.6.2 have a buffer overflow that can be
triggered when tracing the network by a bad NFS packet.

We are not yet aware if this issue is fully exploitable; however, users of
tcpdump are advised to upgrade to these errata packages which contain a
patch for this issue.

The Common Vulnerabilities and Exposures project ( has
assigned the name CAN-2002-0380 to this issue.  This issue was found by
David Woodhouse of Red Hat.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

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 directory 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:


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

5. Bug IDs fixed ( for more info):

55145 - tcpdump segfaults when displaying NFS traffic.
63113 - Start script refers to non/existing /etc/init.d directory

6. RPMs required:

Red Hat Linux 6.2:





Red Hat Linux 7.0:




Red Hat Linux 7.1:





Red Hat Linux 7.2:




7. Verification:

MD5 sum                          Package Name
d31951e4a06b8c08c1e39abfd0b13955 6.2/en/os/SRPMS/tcpdump-3.6.2-
b06ccff8c19676918f60bf2708daf1ad 6.2/en/os/alpha/arpwatch-2.1a11-
4da963c19df79272f2f97c219206a04e 6.2/en/os/alpha/libpcap-0.6.2-
bb5ca0570255798bcccf651e4169f45c 6.2/en/os/alpha/tcpdump-3.6.2-
47a2bf8d8534d8e70530d9c394da8f92 6.2/en/os/i386/arpwatch-2.1a11-
05b1442e28f961440c4345e5a7f9d4d8 6.2/en/os/i386/libpcap-0.6.2-
f617a999adeff7a71b557eef6a6271a9 6.2/en/os/i386/tcpdump-3.6.2-
629b18c6f91d21a2b503d05349e331a0 6.2/en/os/sparc/arpwatch-2.1a11-
b0f50ae9d447bbe40c411cc4c66215a3 6.2/en/os/sparc/libpcap-0.6.2-
e9317d5b6b2c473a44c6fed9ec7c25fc 6.2/en/os/sparc/tcpdump-3.6.2-
b1abeb15f7a85fb77827e848737c9949 7.0/en/os/SRPMS/tcpdump-3.6.2-
75f65e70953953b346359967a89a1980 7.0/en/os/alpha/arpwatch-2.1a11-
3418be3679d89faa81a0732dba448897 7.0/en/os/alpha/libpcap-0.6.2-
659f8cb30777c5022c52a54d96baca54 7.0/en/os/alpha/tcpdump-3.6.2-
098c900c75d194402fade5528b2263ca 7.0/en/os/i386/arpwatch-2.1a11-
186da1899fea780a15501354de5d6715 7.0/en/os/i386/libpcap-0.6.2-
db064ed0c0b16986b92e97bf2492c945 7.0/en/os/i386/tcpdump-3.6.2-
27bf8dea340db81f1e946356c6bef684 7.1/en/os/SRPMS/tcpdump-3.6.2-
a677cec9114214c2ea5e5b17e709883d 7.1/en/os/alpha/arpwatch-2.1a11-
f7b8cf962abe27d65d628dae5cb992bd 7.1/en/os/alpha/libpcap-0.6.2-
755e2fa9fb0530735e03388f702cfd38 7.1/en/os/alpha/tcpdump-3.6.2-
edc6718ed479661f40c929da92b4e24b 7.1/en/os/i386/arpwatch-2.1a11-
4e1a186b4287de4183a7fca4d868906e 7.1/en/os/i386/libpcap-0.6.2-
2eb63c329def52d1bcdd88f8b3d01841 7.1/en/os/i386/tcpdump-3.6.2-
17319e98b00c707f8c924766f0395aad 7.1/en/os/ia64/arpwatch-2.1a11-
8a214b04f325451eecaf08574ebacc7a 7.1/en/os/ia64/libpcap-0.6.2-
90db41ce76a94d2d10369437704bb934 7.1/en/os/ia64/tcpdump-3.6.2-
1cfcf4efdad9c8d44f9c70a9da8da690 7.2/en/os/SRPMS/tcpdump-3.6.2-
82f93afd069a3b85ddf5a44daeff589f 7.2/en/os/i386/arpwatch-2.1a11-
f26ebb5d1cbb91d4b5effd9174f1728d 7.2/en/os/i386/libpcap-0.6.2-
cc168b456fbde106ad1879fe7346c1ee 7.2/en/os/i386/tcpdump-3.6.2-
74863a3b3110d2dbb03a03c1ad213152 7.2/en/os/ia64/arpwatch-2.1a11-
876adc0c4d794e75a48e5c6b87fbca45 7.2/en/os/ia64/libpcap-0.6.2-
f7543f13b1734c779cafd600566569b2 7.2/en/os/ia64/tcpdump-3.6.2-

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:

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, 2002 Red Hat, Inc.