IBM Informix Dynamic Server (IDS) installserver.txt symlink
| informix-installserver-symlink (29297) |  Medium Risk |
Description:
IBM Informix Dynamic Server (IDS), IBM Informix Client Software Development Kit (CSDK), and IBM Informix Connect could allow a local attacker to launch a symlink attack. The installserver.txt file is created insecurely in the /tmp directory during installation. A local attacker could create a symbolic link from the installserver.txt file to an arbitrary file on the system, which could allow the attacker to create or overwrite files on the system once the installation script is executed.
Platforms Affected:
- IBM, Informix Client SDK 2.90
- IBM, Informix Dynamic Server 10.0
- IBM, Informix i-Connect 2.90
Remedy:
Refer to IBM Support Document 1247438 for patch, upgrade or workaround information. See References.
Consequences:
File Manipulation
References:
- Full-Disclosure Mailing List, Sun Oct 01 2006 - 19:24:59 CDT , IBM Informix Dynamic Server V10.0 File Clobbering during Install at http://archives.neohapsis.com/archives/fulldisclosure/2006-10/0013.html.
- IBM Support & downloads, Possible security vulnerabilities with Informix Dynamic Server, CSDK, and I-Connect product installers at http://www-1.ibm.com/support/docview.wss?uid=swg21247438.
- Informix Web page, IBM Software - Informix Dynamic Server (IDS) - Product Overview at http://www-306.ibm.com/software/data/informix/ids/.
- BID-20300: Multiple IBM Products Installer Insecure Temporary File Creation Vulnerability
- CVE-2006-5163: IBM Informix Dynamic Server 10.UC3RC1 Trial for Linux and possibly other versions creates /tmp/installserver.txt with insecure permissions, which allows local users to append data to arbitrary files via a symlink attack.
- CVE-2006-5664: The installation script in IBM Informix Dynamic Server 10.00, Informix Client Software Development Kit (CSDK) 2.90, and Informix I-Connect 2.90 allows local users to compromise security via a symlink attack on temporary files.
- OSVDB ID: 29349: IBM Informix Dynamic Server Installation Script Permission Weakness Local Privilege Escalation
- SA22223: IBM Informix Dynamic Server Insecure Temporary File Creation
- SA22609: IBM Informix Products Insecure Permissions and Temporary File Creation
- SECTRACK ID: 1017156: Informix Dynamic Server Uses Unsafe Installation Scripts and Directory Permissions That May Let Local Users Gain Elevated Privileges
- VUPEN/ADV-2006-3883: IBM Informix Dynamic Server Insecure Temporary File Creation Vulnerability
- VUPEN/ADV-2006-4280: IBM Informix Insecure Permissions and Temporary File Creation Vulnerabilities
Reported:
Oct 01, 2006
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