Multiple Arbitrary File Access (Write/Read) Vulnerabilities

NGSSoftware Insight Security Research Advisory

Name: Multiple Arbitrary File Access (Write/Read) Vulnerabilities
Systems Affected: All version of Informix
Severity: High
Vendor URL:
Author: David Litchfield [ davidl@xxxxxxxxxxxxxxx ]
Date of Public Advisory: 2nd August 2006
Advisory number: #NISR02082006I
Advisory URL:

Informix Dynamic Server is a database developed by IBM. During a security assessment of Informix multiple file creation/write/read issues were discovered.

The LOTOFILE function and rlt_tracefile_set functions can be used to create and write to files. The SET DEBUG FILE can also be used to create and write to files.

Fix Information
IBM was alerted to this flaw on the 6th January 2005. Patches have now been made available; further a workaround is to revoke public execute permission of the functions involved. There is no workaround for the set debug file.

NGSSQuirreL for Informix, an advanced vulnerability assessment scanner designed specifically for Informix, can be used to accurately determine whether your servers are vulnerable to this flaw. More information about NGSSQuirreL for Informix can be found here

About NGSSoftware

NGSSoftware develops vulnerability assessment and compliancy tools for database servers including Oracle, Microsoft SQL Server, DB2, Sybase and Informix. Headquartered in the United Kingdom NGS has offices in London, St. Andrews (UK), Sydney, Brisbane, and Perth (Australia) and Texas in the United States; NGSConsulting provide services to some of the largest and most demanding organizations around the globe.

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