tcpdump vulnerable to buffer overflow via improper decoding of AFS RPC (Rx) packets

Overview

A vulnerability exists in tcpdump that could allow an attacker to execute arbitrary code with the privileges of tcpdump, typically root.

Description

tcpdump is a widely-used network sniffer that is capable of decoding AFS traffic. A buffer overflow vulnerability has been discovered in tcpdump’s handling of AFS RPC (Rx) packets. Rx is the proprietary remote procedure call (RPC) protocol used by AFS to communicate between AFS processes running on different systems. According to FreeBSD Security Advisory FreeBSD-SA-01:48, this vulnerability is caused by “…incorrect string length handling in the decoding of AFS RPC packets.”

---

Impact

A remote attacker who is able to send crafted AFS RPC (Rx) packets may be able to execute arbitrary code or cause a denial of service on a system running tcpdump. If tcpdump is operating in promiscuous mode, the attacker only needs to send packets to the ethernet segment in which tcpdump is running. On Linux systems, tcpdump runs with root privileges. On other UNIX systems, tcpdump may run with root privileges. On Windows 2000 systems, windump can be run with user privileges.

---

Solution

Upgrade tcpdump

This vulnerability was addressed in July 2001. tcpdump3_6_rel3 and later are not vulnerable. tcpdump 3.6.2 and earlier are vulnerable. Obtain an upgraded tcpdump package or apply the appropriate patch from your vendor.

---

Filter AFS Traffic

Block AFS RPC (Rx) packets destined to hosts (and networks with hosts) running vulnerable versions of tcpdump. AFS services communicate on a number of UDP ports:

7000/udp fileserver
7001/udp callback (cache manager on AFS client)
7002/udp ptserver
7003/udp vlserver
7004/udp kaserver
7005/udp volserver
7007/udp bosserver
7008/udp upserver
7009/udp rmtsysd (NFS/AFS translator)
7021/udp buserver
7025-65535/udp butc (backup servers)

It may also be possible to instruct tcpdump not to decode packets that use AFS Rx port numbers (ports 7021 and >7025 are not included in this filter):

$ tcpdump not udp port 7000 or 7001 or 7002 or 7003 or 7004 or 7005 or 7006 or 7007 or 7008 or 7009

While blocking AFS Rx traffic into a network may protect internal hosts, it may not protect systems that run tcpdump at the network perimeter, such as an Intrusion Detection System (IDS). Also, it is unclear how tcpdump determines that a given packet should be decoded as an AFS Rx packet. It is likely that tcpdump does not rely on port numbers, and if this is the case then an attacker could easily bypass port filters by using non-AFS port numbers.

---

Vendor Information

797201

Filter by status: All Affected Not Affected Unknown

Filter by content: __ Additional information available

__ Sort by: Status Alphabetical

Expand all

Javascript is disabled. Click here to view vendors.

Conectiva __ Affected

Updated: June 07, 2002

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

`- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT

---

PACKAGE : tcpdump
SUMMARY : Several vulnerabilities
DATE : 2002-05-07 18:23:00
ID : CLA-2002:480
RELEVANT
RELEASES : 5.0, 5.1, 6.0, 7.0, 8
- -------------------------------------------------------------------------
DESCRIPTION
Tcpdump is a command-line tool for monitoring network traffic. It
uses libpcap, a library which provides a portable framework for
low-level network monitoring. Both are developed by the same
team[1].
This advisory addresses problems found in both projects.
tcpdump buffer overflows: during a tcpdump code auditing done by
FreeBSD developers, several buffer overflows were discovered[2] in
tcpdump versions prior to 3.5. New versions (including 3.6.2) are
also vulnerable to another buffer overflow[3] in AFS RPC decoding
functions, as pointed out by Nick Cleaton <[email protected]>.
These vulnerablities could be exploited by a remote attacker to crash
the tcpdump process or even execute arbitrary code as the user
running tcpdump (which usually is root).
libpcap 0.6 has been audited and a better buffer boundary checking
was implemented in several functions, thus making it more safe.
This upgrade also fixes a lot of minor bugs[4] in both tcpdump and
libpcap. Notice that the number of vulnerabilities and bug fixes
which apply to every version of Conectiva Linux varies accordingly to
the tcpdump/libpcap versions included in it. This update brings all
packages to the most recent version as of this date plus the tcpdump
security patches which have not yet been included in the upstream
stable version (3.6.2).
`

SOLUTION All tcpdump users should upgrade their packages immediately. If you're only using libpcap, you should also consider upgrading since this new version solves several minor bugs.

REFERENCES: 1.http://www.tcpdump.org/ 2.http://www.ciac.org/ciac/bulletins/l-015.shtml 3.ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:48.tcpdump.asc 3.http://www.tcpdump.org/tcpdump-changes.txt

DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ``<ftp://atualizacoes.conectiva.com.br/5.0/i386/arpwatch-2.1a11-9U50_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.0/i386/libpcap-0.6.2-1U50_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.0/i386/libpcap-devel-0.6.2-1U50_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.0/i386/libpcap-devel-static-0.6.2-1U50_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.0/i386/tcpdump-3.6.2-1U50_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/tcpdump-3.6.2-1U50_1cl.src.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/i386/arpwatch-2.1a11-9U51_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/i386/libpcap-0.6.2-1U51_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/i386/libpcap-devel-0.6.2-1U51_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/i386/libpcap-devel-static-0.6.2-1U51_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/i386/tcpdump-3.6.2-1U51_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/tcpdump-3.6.2-1U51_1cl.src.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/RPMS/arpwatch-2.1a11-9U60_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-0.6.2-1U60_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-0.6.2-1U60_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-static-0.6.2-1U60_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/RPMS/tcpdump-3.6.2-1U60_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/tcpdump-3.6.2-1U60_1cl.src.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/RPMS/arpwatch-2.1a11-9U70_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-0.6.2-1U70_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-0.6.2-1U70_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-static-0.6.2-1U70_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/RPMS/tcpdump-3.6.2-1U70_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/tcpdump-3.6.2-1U70_1cl.src.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/RPMS/libpcap-0.6.2-4U8_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/RPMS/libpcap-devel-0.6.2-4U8_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/RPMS/libpcap-devel-static-0.6.2-4U8_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/RPMS/tcpdump-3.6.2-3U8_1cl.i386.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/SRPMS/libpcap-0.6.2-4U8_1cl.src.rpm>`` ``<ftp://atualizacoes.conectiva.com.br/8/SRPMS/tcpdump-3.6.2-3U8_1cl.src.rpm>``

`ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:

• add the following line to /etc/apt/sources.list if it is not there yet
  (you may also use linuxconf to do this):
  rpm [cncbr] <ftp://atualizacoes.conectiva.com.br> 6.0/conectiva updates
  (replace 6.0 with the correct version number if you are not running CL6.0)
  - run: apt-get update
• after that, execute: apt-get upgrade
  Detailed instructions reagarding the use of apt and upgrade examples
  can be found at <http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en>
  `

`- -------------------------------------------------------------------------
All packages are signed with Conectiva’s GPG key. The key and instructions
on how to import it can be found at
<http://distro.conectiva.com.br/seguranca/chave/?idioma=en>
Instructions on how to check the signatures of the RPM packages can be
found at <http://distro.conectiva.com.br/seguranca/politica/?idioma=en>

---

All our advisories and generic update instructions can be viewed at
<http://distro.conectiva.com.br/atualizacoes/?idioma=en>
- -------------------------------------------------------------------------
subscribe: [email protected]
unsubscribe: [email protected]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see <http://www.gnupg.org>
iD8DBQE82EXm42jd0JmAcZARApLoAKCthLJH/QNa2TlwAV+EK+xzMVlSeQCgr7FZ
HG5wOhKACPmu8DFvQMsyA3w=
=IAOF
-----END PGP SIGNATURE-----`

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

FreeBSD __ Affected

Updated: June 07, 2002

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE-----

=============================================================================
FreeBSD-SA-00:61 Security Advisory
FreeBSD, Inc.

Topic: tcpdump contains remote vulnerabilities [REISSUED]

Category: core
Module: tcpdump
Announced: 2000-10-31
Reissued:2000-11-06
Credits:Discovered during internal auditing.
Affects: All releases of FreeBSD 3.x, 4.x prior to 4.2
FreeBSD 3.5.1-STABLE and 4.1.1-STABLE prior to the
correction date
Corrected: 2000-10-04 (FreeBSD 4.1.1-STABLE)
2000-10-05 (FreeBSD 3.5.1-STABLE)
Vendor status:Patch released
FreeBSD only: NO

0. Revision History

v1.0 2000-10-31 Initial release
v1.1 2000-11-06 Corrected patch

I. Background

tcpdump is a tool for monitoring network activity.

II. Problem Description

Several overflowable buffers were discovered in the version of tcpdump
included in FreeBSD, during internal source code auditing. Some
simply allow the remote attacker to crash the local tcpdump process,
but there is a more serious vulnerability in the decoding of AFS ACL
packets in the more recent version of tcpdump (tcpdump 3.5) included
in FreeBSD 4.0-RELEASE, 4.1-RELEASE and 4.1.1-RELEASE, which may allow
a remote attacker to execute arbitrary code on the local system
(usually root, since root privileges are required to run tcpdump).

The former issue may be a problem for systems using tcpdump as a form
of intrusion detection system, i.e. to monitor suspicious network
activity: after the attacker crashes any listening tcpdump processes
their subsequent activities will not be observed.

All released versions of FreeBSD prior to the correction date
including 3.5.1-RELEASE, 4.0-RELEASE, 4.1-RELEASE and 4.1.1-RELEASE
are vulnerable to the "remote crash" problems, and FreeBSD
4.0-RELEASE, 4.1-RELEASE and 4.1.1-RELEASE are also vulnerable to the
"remote execution" vulnerability. Both problems were corrected in
4.1.1-STABLE prior to the release of FreeBSD 4.2-RELEASE.

III. Impact

Remote users can cause the local tcpdump process to crash, and (under
FreeBSD 4.0-RELEASE, 4.1-RELEASE, 4.1.1-RELEASE and 4.1.1-STABLE prior
to the correction date) may be able to cause arbitrary code to be
executed as the user running tcpdump, usually root.

IV. Workaround

Do not use vulnerable versions of tcpdump in network environments
which may contain packets from untrusted sources.

V. Solution

One of the following:

1) Upgrade your vulnerable FreeBSD system to 4.1.1-STABLE or
3.5.1-STABLE after the respective correction dates.

2a) FreeBSD 3.x systems prior to the correction date

Download the patch and the detached PGP signature from the following
locations, and verify the signature using your PGP utility.

<ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-3.x.patch>
<ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-3.x.patch.asc>

# cd /usr/src/contrib/tcpdump
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/tcpdump
# make depend && make all install

2b) FreeBSD 4.x systems prior to the correction date

NOTE: The patch distributed with the original version of this advisory
was incomplete and did not include all of the security fixes made to
the tcpdump utility. In particular, it did not address the remote code
execution vulnerability.

Download the patch and the detached PGP signature from the following
locations, and verify the signature using your PGP utility.

<ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-4.x.patch.v1.1>
<ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-4.x.patch.v1.1.asc>

# cd /usr/src/contrib/tcpdump
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/tcpdump
# make depend && make all install
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.4 (FreeBSD)
Comment: For info see <http://www.gnupg.org>

iQCVAwUBOgcNKFUuHi5z0oilAQGYQAP9F00eE4rd0M46f8WMWTO7uFb1gV2p4Y0l
KV0vT1wMy+PdmFNpo7SVrb/tdpa4Wtxb/Q/tu7RDZQqFI29yBPTFnE1iu8T2BSAm
cO/dE5ypkjJkEjf8QjxqQXVhTbtIVVQa3Tosw3AdUFP0gKHUkZ36ryCQVxbqRMQK
c0ZkdbwESp8=
=uaOo
-----END PGP SIGNATURE-----

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

MandrakeSoft __ Affected

Updated: June 07, 2002

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

________________________________________________________________________
` Mandrake Linux Security Update Advisory

---

Package name: tcpdump
Advisory ID: MDKSA-2002:032
Date: May 16th, 2002
Affected versions: 7.1, 7.2, 8.0, 8.1, 8.2, Corporate Server 1.0.1
Single Network Firewall 7.2

---

Problem Description:
Several buffer overflows were found in the tcpdump package by FreeBSD
developers during a code audit, in versions prior to 3.5. However,
newer versions of tcpdump, including 3.6.2, are also vulnerable to
another buffer overflow in the AFS RPC decoding functions, which was
discovered by Nick Cleaton. These vulnerabilities could be used by
a remote attacker to crash the the tcpdump process or possibly even
be exploited to execute arbitrary code as the user running tcpdump,
which is usually root.
The newer libpcap 0.6 has also been audited to make it more safe by
implementing better buffer boundary checks in several functions.

---

References:
<http://www.ciac.org/ciac/bulletins/l-015.shtml>
<ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:48.tcpdump.asc>

---

Updated Packages:
Linux-Mandrake 7.1:
a17ec464d576bdbd870dc6a5d25fc59d 7.1/RPMS/libpcap-0.6.2-3.2mdk.i586.rpm
ed780612ab8620e84e8310432a5df0b9 7.1/RPMS/libpcap-devel-0.6.2-3.2mdk.i586.rpm
a186519910760e36b7e50456412ab20e 7.1/RPMS/tcpdump-3.6.2-2.2mdk.i586.rpm
5e6091d2f916b180ffc80d60e2005a49 7.1/SRPMS/libpcap-0.6.2-3.2mdk.src.rpm
a997724147a333e27e72670bff28e5ee 7.1/SRPMS/tcpdump-3.6.2-2.2mdk.src.rpm
Linux-Mandrake 7.2:
e39a58560c3ec60a574c63dd9e383fda 7.2/RPMS/libpcap-0.6.2-3.2mdk.i586.rpm
4600b4d1a435d17a77560a36e28ddc70 7.2/RPMS/libpcap-devel-0.6.2-3.2mdk.i586.rpm
fc014253b27e44c8a230f936d7eadf9e 7.2/RPMS/tcpdump-3.6.2-2.2mdk.i586.rpm
5e6091d2f916b180ffc80d60e2005a49 7.2/SRPMS/libpcap-0.6.2-3.2mdk.src.rpm
a997724147a333e27e72670bff28e5ee 7.2/SRPMS/tcpdump-3.6.2-2.2mdk.src.rpm
Mandrake Linux 8.0:
d8deeabab302271054ecad942a14013e 8.0/RPMS/libpcap0-0.6.2-3.1mdk.i586.rpm
b2aa6d27578b8699640b6ed2e76ba228 8.0/RPMS/libpcap0-devel-0.6.2-3.1mdk.i586.rpm
16eac5435d8b8e1075c10d393a2914a5 8.0/RPMS/tcpdump-3.6.2-2.1mdk.i586.rpm
4b1956a781b1185e693a26037d4804a5 8.0/SRPMS/libpcap-0.6.2-3.1mdk.src.rpm
683c3b6f0ae7754090cbcf480cd731b0 8.0/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Mandrake Linux 8.0/ppc:
4a4f5cca7fc50d1616b857b89afe3ae3 ppc/8.0/RPMS/libpcap0-0.6.2-3.1mdk.ppc.rpm
11be44f15a54a9654cd48b5b8aed04ba ppc/8.0/RPMS/libpcap0-devel-0.6.2-3.1mdk.ppc.rpm
68255f8f80d88b91fd488d6379db81df ppc/8.0/RPMS/tcpdump-3.6.2-2.1mdk.ppc.rpm
4b1956a781b1185e693a26037d4804a5 ppc/8.0/SRPMS/libpcap-0.6.2-3.1mdk.src.rpm
683c3b6f0ae7754090cbcf480cd731b0 ppc/8.0/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Mandrake Linux 8.1:
39715d1c613144e859f0386ee583377a 8.1/RPMS/tcpdump-3.6.2-2.1mdk.i586.rpm
683c3b6f0ae7754090cbcf480cd731b0 8.1/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Mandrake Linux 8.1/ia64:
6331901e596e243099aa6474481ea88a ia64/8.1/RPMS/tcpdump-3.6.2-2.1mdk.ia64.rpm
683c3b6f0ae7754090cbcf480cd731b0 ia64/8.1/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Mandrake Linux 8.2:
8c36a78c9a086c2d582d70d431533650 8.2/RPMS/tcpdump-3.6.2-2.1mdk.i586.rpm
683c3b6f0ae7754090cbcf480cd731b0 8.2/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Mandrake Linux 8.2/ppc:
081041c2713a9c76c5bf2fc727a03c45 ppc/8.2/RPMS/tcpdump-3.6.2-2.1mdk.ppc.rpm
683c3b6f0ae7754090cbcf480cd731b0 ppc/8.2/SRPMS/tcpdump-3.6.2-2.1mdk.src.rpm
Corporate Server 1.0.1:
a17ec464d576bdbd870dc6a5d25fc59d 1.0.1/RPMS/libpcap-0.6.2-3.2mdk.i586.rpm
ed780612ab8620e84e8310432a5df0b9 1.0.1/RPMS/libpcap-devel-0.6.2-3.2mdk.i586.rpm
a186519910760e36b7e50456412ab20e 1.0.1/RPMS/tcpdump-3.6.2-2.2mdk.i586.rpm
5e6091d2f916b180ffc80d60e2005a49 1.0.1/SRPMS/libpcap-0.6.2-3.2mdk.src.rpm
a997724147a333e27e72670bff28e5ee 1.0.1/SRPMS/tcpdump-3.6.2-2.2mdk.src.rpm
Single Network Firewall 7.2:
e39a58560c3ec60a574c63dd9e383fda snf7.2/RPMS/libpcap-0.6.2-3.2mdk.i586.rpm
4600b4d1a435d17a77560a36e28ddc70 snf7.2/RPMS/libpcap-devel-0.6.2-3.2mdk.i586.rpm
fc014253b27e44c8a230f936d7eadf9e snf7.2/RPMS/tcpdump-3.6.2-2.2mdk.i586.rpm
5e6091d2f916b180ffc80d60e2005a49 snf7.2/SRPMS/libpcap-0.6.2-3.2mdk.src.rpm
a997724147a333e27e72670bff28e5ee snf7.2/SRPMS/tcpdump-3.6.2-2.2mdk.src.rpm

---

Bug IDs fixed (see <https://qa.mandrakesoft.com> for more information):
________________________________________________________________________
To upgrade automatically, use MandrakeUpdate. The verification of md5
checksums and GPG signatures is performed automatically for you.
If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with “rpm -Fvh *.rpm”. A list of
FTP mirrors can be obtained from:
<http://www.mandrakesecure.net/en/ftp.php>
Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:
rpm --checksig <filename>
All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team from:
<https://www.mandrakesecure.net/RPM-GPG-KEYS>
Please be aware that sometimes it takes the mirrors a few hours to
update.
You can view other update advisories for Mandrake Linux at:
<http://www.mandrakesecure.net/en/advisories/>
MandrakeSoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
visiting:
<http://www.mandrakesecure.net/en/mlist.php>
If you want to report vulnerabilities, please contact
[email protected]

---

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
<[email protected]>
`

- -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.0.5 (GNU/Linux) Comment: For info see ``<http://www.gnupg.org>``
`mQGiBDlp594RBAC2tDozI3ZgQsE7XwxurJCJrX0L5vx7SDByR5GHDdWekGhdiday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=0ahQ

• -----END PGP PUBLIC KEY BLOCK-----
  -----BEGIN PGP SIGNATURE-----
  Version: GnuPG v1.0.6 (GNU/Linux)
  Comment: For info see <http://www.gnupg.org>
  iD8DBQE85BHvmqjQ0CJFipgRAndZAJ4jGDLirjWc8KEQFinzaUpmfh2rVgCfZlZB
  LBlgpYed4BqKI6Ta48akH6A=
  =v0yA
  -----END PGP SIGNATURE-----`

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

Red Hat, Inc. __ Affected

Updated: June 07, 2002

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Red Hat has released Red Hat Security Advisory RHSA-2001:089.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

tcpdump.org __ Affected

Updated: June 12, 2002

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Per tcpdump.org CVS annotations [<http://cvs.tcpdump.org/cgi-bin/cvsweb/tcpdump/print-rx.c&gt;]: “Don’t allow STROUT() to use a negative string length.” See also [http://cvs.tcpdump.org/cgi-bin/cvsweb/tcpdump/print-rx.c?r1=1.22&r2=1.23].

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

Caldera __ Unknown

Updated: June 07, 2002

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Caldera has released Caldera Security Advisory CSSA-2002-025.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

Politecnico Di Torino __ Unknown

Updated: June 07, 2002

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The Politecnico Di Torino ports tcpdump to the Windows platform as windump. The current (July 2002) version of windump is 3.6.2, which is vulnerable.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23797201 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.securityfocus.com/bid/3065&gt;
• <ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:48.tcpdump.asc&gt;
• <ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-01:48/tcpdump-4.x.patch&gt;
• http://cvs.tcpdump.org/cgi-bin/cvsweb/tcpdump/print-rx.c?r1=1.22&r2=1.23

Acknowledgements

The CERT Coordination Center thanks FreeBSD and tcpdump.org for information used in this document.

This document was written by Art Manion.

Other Information

CVE IDs:	CVE-2001-1279
Severity Metric:	10.94 Date Public: