OpenPKG CVS Repository
http://cvs.openpkg.org/
____________________________________________________________________________
Server: cvs.openpkg.org Name: Michael Schloh
Root: /e/openpkg/cvs Email: [EMAIL PROTECTED]
Module: openpkg-web Date: 28-Feb-2003 14:52:29
Branch: HEAD Handle: 2003022813522900
Added files:
openpkg-web/security OpenPKG-SA-2003.014-tcpdump.txt
Log:
Add text for upcoming security advisory against CAN-2003-0108.
Summary:
Revision Changes Path
1.1 +90 -0 openpkg-web/security/OpenPKG-SA-2003.014-tcpdump.txt
____________________________________________________________________________
patch -p0 <<'@@ .'
Index: openpkg-web/security/OpenPKG-SA-2003.014-tcpdump.txt
============================================================================
$ cvs diff -u -r0 -r1.1 OpenPKG-SA-2003.014-tcpdump.txt
--- /dev/null 2003-02-28 14:52:29.000000000 +0100
+++ OpenPKG-SA-2003.014-tcpdump.txt 2003-02-28 14:52:29.000000000 +0100
@@ -0,0 +1,90 @@
+________________________________________________________________________
+
+OpenPKG Security Advisory The OpenPKG Project
+http://www.openpkg.org/security.html http://www.openpkg.org
[EMAIL PROTECTED] [EMAIL PROTECTED]
+OpenPKG-SA-2003.014 28-Feb-2003
+________________________________________________________________________
+
+Package: tcpdump
+Vulnerability: remote exploit causing infinite loop
+OpenPKG Specific: no
+
+Affected Releases: Affected Packages: Corrected Packages:
+OpenPKG CURRENT <= tcpdump-3.7.1-20020822 >= tcpdump-3.7.2-20030227
+OpenPKG 1.2 <= tcpdump-3.7.1-1.2.0 >= tcpdump-3.7.1-1.2.1
+OpenPKG 1.1 <= tcpdump-3.7.1-1.1.0 >= tcpdump-3.7.1-1.1.1
+
+Dependent Packages: none
+
+Description:
+ Andrew Griffiths discovered a vulnerability in tcpdump which could
+ result in a denial of service attack due to an endless loop consuming
+ CPU resources. The Common Vulnerabilities and Exposures (CVE) project
+ assigned the id CAN-2003-0108 [0] to the problem.
+
+ The isakmp_sub_print function in tcpdump [1] contains a loop construct
+ that allows remote attackers to cause a denial of service via a certain
+ malformed ISAKMP packet to UDP port 500. This causes tcpdump to enter
+ an infinite loop potentially disabling the machine. To regain normal
+ functionality once again, the affected application must be restarted.
+
+ Please check whether you are affected by running "<prefix>/bin/rpm -q
+ tcpdump". If you have the "tcpdump" package installed and its version
+ is affected (see above), we recommend that you immediately upgrade it
+ (see Solution) and it's dependent packages (see above), if any, too.
+ [2][3]
+
+Workaround:
+ An ad hoc work around that can be implemented is to simply filter out
+ parsing of packets destined to TCP or UDP port 500. This will prevent
+ a malformed packet from affected a vulnerable version of tcpdump. The
+ addition of the following boolean string can be used to accomplish
+ this task:
+
+ [and] dst port not 500
+
+ Where the [and] is optional depending on whether or not additional
+ boolean expressions are provided.
+
+Solution:
+ Select the updated source RPM appropriate for your OpenPKG release
+ [4][5], fetch it from the OpenPKG FTP service [6][7] or a mirror
+ location, verify its integrity [8], build a corresponding binary RPM
+ from it [2] and update your OpenPKG installation by applying the binary
+ RPM [3]. For the current release OpenPKG 1.2, perform the following
+ operations to permanently fix the security problem (for other releases
+ adjust accordingly).
+
+ $ ftp ftp.openpkg.org
+ ftp> bin
+ ftp> cd release/1.2/UPD
+ ftp> get tcpdump-3.7.1-1.2.1.src.rpm
+ ftp> bye
+ $ <prefix>/bin/rpm -v --checksig tcpdump-3.7.1-1.2.1.src.rpm
+ $ <prefix>/bin/rpm --rebuild tcpdump-3.7.1-1.2.1.src.rpm
+ $ su -
+ # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/tcpdump-3.7.1-1.2.1.*.rpm
+________________________________________________________________________
+
+References:
+ [0] http://www.tcpdump.org/
+ [1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0108
+ [2] http://www.openpkg.org/tutorial.html#regular-source
+ [3] http://www.openpkg.org/tutorial.html#regular-binary
+ [4] ftp://ftp.openpkg.org/release/1.1/UPD/tcpdump-3.7.1-1.1.1.src.rpm
+ [5] ftp://ftp.openpkg.org/release/1.2/UPD/tcpdump-3.7.1-1.2.1.src.rpm
+ [6] ftp://ftp.openpkg.org/release/1.1/UPD/
+ [7] ftp://ftp.openpkg.org/release/1.2/UPD/
+ [8] http://www.openpkg.org/security.html#signature
+________________________________________________________________________
+
+For security reasons, this advisory was digitally signed with
+the OpenPGP public key "OpenPKG <[EMAIL PROTECTED]>" (ID 63C4CB9F)
+of the OpenPKG project which you can find under the official URL
+http://www.openpkg.org/openpkg.pgp or on http://keyserver.pgp.com/. To
+check the integrity of this advisory, verify its digital signature by
+using GnuPG (http://www.gnupg.org/). For instance, pipe this message to
+the command "gpg --verify --keyserver keyserver.pgp.com".
+________________________________________________________________________
+
@@ .
______________________________________________________________________
The OpenPKG Project www.openpkg.org
CVS Repository Commit List [EMAIL PROTECTED]
