SUSE Security Announcement: tcpdump (SuSE-SA:2004:002)

Posted by dave on Jan 15, 2004 10:43 AM EDT
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Tcpdump is a well known tool for administrators to analyze network traffic. There is a bug in the tcpdump code responsible for handling ISAKMP messages. This bug allows remote attackers to destroy a current tcpdump session by tricking the tcpdump program with evil ISAKMP messages to enter an endless loop.

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SUSE Security Announcement

Package: tcpdump Announcement-ID: SuSE-SA:2004:002 Date: Wed Jan 14 14:00:00 MET 2004 Affected products: 8.0, 8.1, 8.2, 9.0 SuSE eMail Server III SuSE Firewall Adminhost VPN SuSE Linux Admin-CD for Firewall SuSE Firewall on CD 2 - VPN SuSE Firewall on CD 2 SuSE Linux Enterprise Server 7 SLES 8 for IBM iSeries and IBM pSeries SuSE Linux Enterprise Server 8 SuSE Linux Desktop 1.0 SuSE Linux School Server for i386 SuSE Linux Standard Server 8 SuSE Linux Office Server UnitedLinux 1.0 Vulnerability Type: remote DoS Severity (1-10): 3 SUSE default package: yes Cross References: http://www.tcpdump.org CAN-2003-0989

Content of this advisory: 1) security vulnerability resolved: remote DoS condition in tcpdumps ISAKMP handling problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - opera - mc - mod_gzip - tripwire - cvs - gnome-filesystem - XDM (XFree86, xf86) - inn - mpg321 - popper - kdepim3 - pin - 3ddiag - mod_auth_shadow 3) standard appendix (further information)

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1) problem description, brief discussion, solution, upgrade information

Tcpdump is a well known tool for administrators to analyze network traffic. There is a bug in the tcpdump code responsible for handling ISAKMP messages. This bug allows remote attackers to destroy a current tcpdump session by tricking the tcpdump program with evil ISAKMP messages to enter an endless loop.

Please download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement. Then, install the package using the command "rpm -Fhv file.rpm" to apply the update. Our maintenance customers are being notified individually. The packages are being offered to install from the maintenance web.

i386 Intel Platform:

SuSE-9.0: ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/tcpdump-3.7.2-72.i586.rpm a4395d7d819ea8918778f9a3b91c297c patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/tcpdump-3.7.2-72.i586.patch.rpm 4eae84a6074af7c2386f9145a49f9477 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/tcpdump-3.7.2-72.src.rpm b32b0e08e9add34b3c42599734723454

SuSE-8.2: ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/tcpdump-3.7.1-341.i586.rpm 39c8e448e4056111444658ce93281ca3 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/tcpdump-3.7.1-341.i586.patch.rpm dfcb12acdad084fcf15508361a3018b5 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/tcpdump-3.7.1-341.src.rpm b92c579649acc9fb19810bcc7a670d6d

SuSE-8.1: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/tcpdump-3.7.1-341.i586.rpm 5527a4823b041894324ae65b02e40011 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/tcpdump-3.7.1-341.i586.patch.rpm f4c933fd520dbcab98092e5a2fe8846c source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/tcpdump-3.7.1-341.src.rpm 0b118d8fe78cea0cc2405a934a77b7fd

SuSE-8.0: ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/tcpdump-3.6.2-330.i386.rpm d77a4e84796cc96be12c97ea19d272bb patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/tcpdump-3.6.2-330.i386.patch.rpm 74882ed085cc27c938ed5529df8040c4 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/tcpdump-3.6.2-330.src.rpm 51f39911dadd7add63e07a922840314c

Opteron x86_64 Platform:

SuSE-9.0: ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/tcpdump-3.7.2-68.x86_64.rpm 0278d04abfe2bcffca8f45e711beebd0 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/tcpdump-3.7.2-68.x86_64.patch.rpm 348b217551a35a6e4f9698e92f3170c8 source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/tcpdump-3.7.2-68.src.rpm 2deb0ae848d115e00593a5639ec5b6b8

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2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- Opera web browser The SuSE Security Team has discovered a flaw in the Opera web browsers X.509 certificate handling during the SSL handshake. It allows attackers to prompt the Opera web browser with invalid certificates containing the public key of the attacker. Thus, he can read or modify the HTTPS traffic without notification by the user. New packages fixing this problem will be available soon on our ftp servers.

- mc By using a special combination of links in archive-files it is possible to execute arbitrary commands while mc tries to open it in its VFS. The packages will be released soon.

- mod_gzip (apache-contrib) The apache module mod_gzip is vulnerable to remote code execution while running in debug-mode. We do not ship this module in debug-mode but future versions will include the fix. Additionally the mod_gzip code was audited to fix more possible security related bugs. After more testing a new apache-contrib RPM package will be released.

- tripwire Tripwire is a file integrity checker. The tripwire version on SuSE Linux 8.2 and 9.0 do crash when a requested file does not exists. New packages will be available soon.

- cvs The cvs server-side can be tricked to create files in the root filesystem of the server by requesting malformed modules. The permissions on the root filesystem normally prevent this malfunction. Additionally the package will include a fix for a format-string bug. New packages will be available soon.

- gnome-filesystem A script included in the gnome-filesystem package handles temporary files insecurely. This script is called by YaST2 with root privileges. The bug can be exploited locally to create or overwrite arbitrary files in the filesystem. The bug is fixed in our current source-tree since November 2003 but nevertheless update packages for older SuSE Linux versions will be released soon.

- XDM (XFree86, xf86) A missing check for failure conditions in the PAM



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