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SecurityAlert : 1686 CVE : CVE-2006-5163 SecurityRisk : Low  (About) Remote Exploit : No Local Exploit : Yes Exploit Given : No Credit : Larry Cashdollar (lcashdol gmail com) Published : 05.10.2006
Advisory Text : IBM Informix (IDS) V10.0 File Clobbering during Install 10/1/2006 Overview From the Website (http://www-306.ibm.com/software/data/informix/ids/) "IBM Informix(r) Dynamic Server (IDS) is a strategic data server in the IBM Information Management Software portfolio that provides blazing online transaction processing (OLTP) performance, legendary reliability, and nearly hands-free administration to businesses of all sizes. IDS 10 offers significant improvements in performance, availability, security, and manageability over previous versions, including patent-pending technology that virtually eliminates downtime and automates many of the tasks associated with deploying mission-critical enterprise systems." Vulnerability During installation the installserver script creates a file in /tmp called installserver.txt an unpriviledged user can symlink this file to another file causing the target file have the contents of installserver.txt appened to it. vapid:/tmp# ls -l /tmp/installserver.txt lrwxrwxrwx 1 auditor auditor 11 Oct 1 18:27 /tmp/installserver.txt -> /etc/passwd After installation the contents of installserver.txt was appened to /etc/passwd. File Permissions The default file permissions of the installation package are too open, an unpriviledged user can take advantage of an installation by a priviledged user by injecting code into the installer script. nobody@vapid:/home/auditor/test$ ls -l total 273168 -rw-rw-rw- 1 root root 10328050 Aug 1 2005 Gls.rpm -rw-rw-rw- 1 32100 1360 5125418 Aug 1 2005 IIF.jar -rw-rw-rw- 1 root root 84374286 Aug 1 2005 IIFServer.rpm -rw-rw-rw- 1 root root 786557 Aug 1 2005 Message.rpm drwxrwxrwx 2 32100 1360 4096 Aug 1 2005 doc -rw-r--r-- 1 auditor auditor 140032000 Oct 1 18:21 iif.10.00.UC3R1TL.Linux.tar -rwxr-xr-x 1 32100 1360 4424 Aug 1 2005 install_rpm -rwxrwxrwx 1 32100 1360 38727685 Oct 1 18:46 installserver -rwxr-xr-x 1 32100 1360 5069 Aug 1 2005 server.ini Resolution The installer scripts should have more restrictive default permissions, also the installserver.txt file should be moved inside of the ismp001 directory that is created during installation. Credit Larry W. Cashdollar http://vapid.dhs.org  Feedback : If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com. |
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