Public Vulnerability Reports

IBM Informix Dynamic Server SQLIDEBUG File Creation Vulnerability



IBM Corp.'s Informix Dynamic Server is an online transaction processing data server. For more information, visit the product's homepage at the following URL.


Local exploitation of a file creation vulnerability in IBM Corp.'s Informix Dynamic Server allows attackers to elevate privileges to root.

When the SQLIDEBUG environment variable is set, several set-uid binaries will log debugging information to the specified file.


Exploitation allows local attackers to gain root privileges.

After creating the file, the file's ownership is changed to match the user and group of the executing user. As such, an attacker could create files that they own anywhere on the system.


iDefense confirmed the existence of this vulnerability in IBM Corp.'s Informix Dynamic Server version 10.00 UC6TL installed on a Linux system. Other versions are also suspected as vulnerable. Versions for other supported Unix systems should also be considered vulnerable.


Removing the set-uid bit from all programs included with Informix will prevent exploitation. However, this could disable some functionality for non-root users.


IBM Corp. has addressed this vulnerability with the release of version 10.00.xC8 of Informix Dynamic Server. For more information, visit the following URL.


The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0369 to this issue. This is a candidate for inclusion in the CVE list (, which standardizes names for security problems.


09/01/2007 Initial vendor notification
09/13/2007 Initial vendor response
01/31/2008 Coordinated public disclosure


The discoverer of this vulnerability wishes to remain anonymous.

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