To: bugtraqat_private announceat_private scoannmodat_private ___________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: OpenServer: IPFilter may incorrectly pass packets Advisory number: CSSA-2002-SCO.9 Issue date: 2002 March 11 Cross reference: ___________________________________________________________________________ 1. Problem Description When matching a packet fragment, insufficient checks were performed to ensure the fragment is valid. Malicious remote users may be able to bypass filtering rules, allowing them to potentially circumvent the firewall. 2. Vulnerable Supported Versions Operating System Version Affected Files ------------------------------------------------------------------ OpenServer <= 5.0.6a /etc/ipnat /etc/ipfnat /etc/conf/pack.d/ipl/Driver.o /etc/ipmon /etc/ipfstat /etc/ipf 3. Workaround None. 4. OpenServer 4.1 Location of Fixed Binaries ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.9/ 4.2 Verification MD5 (erg711678) = 7608023bdd367331a8088a92b114db5c md5 is available for download from ftp://stage.caldera.com/pub/security/tools/ 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: Download erg711678 to the /tmp directory # cd /tmp # tar xvf erg711678 Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 5. References This and other advisories are located at http://stage.caldera.com/support/security This advisory addresses Caldera Security internal incidents SCO-236-1763, erg711678 6. Disclaimer Caldera International, Inc. is not responsible for the misuse of any of the information we provide on our website and/or through our security advisories. Our advisories are a service to our customers intended to promote secure installation and use of Caldera International products. 7. Acknowledgements Caldera would like to admit borrowing the problem description text from FreeBSD security advisory FreeBSD-SA-01:32. ___________________________________________________________________________
This archive was generated by hypermail 2b30 : Tue Mar 12 2002 - 20:51:00 PST