IBM Informix Dynamic Server (IDS) allows remote authenticated users to create and overwrite arbitrary files via the (1) LOTOFILE and (2) trl_tracefile_set functions, and the (3) "SET DEBUG FILE" commands.

Buffer overflow in IBM Informix Dynamic Server (IDS) 9.40.TC7, 9.40.TC8, 10.00.TC4, and 10.00.TC5, when running on Windows, allows remote attackers to execute arbitrary code via a long username, which causes an overflow in vsprintf when displaying in the resulting error message. NOTE: this issue is due to an incomplete fix for CVE-2006-3853.

IBM Informix Dynamic Server (IDS) before 9.40.xC7 and 10.00 before 10.00.xC3 allows allows remote authenticated users to execute arbitrary commands via the (1) "SET DEBUG FILE" SQL command, and the (2) start_onpload and (3) dbexp functions.

Multiple buffer overflows in IBM Informix Dynamic Server (IDS) before 9.40.TC6 and 10.00 before 10.00.TC3 allow remote authenticated users to execute arbitrary code via (1) the getname function, as used by (a) _sq_remview, (b) _sq_remproc, (c) _sq_remperms, (d) _sq_distfetch, and (e) _sq_dcatalog; and the (2) SET DEBUG FILE, (3) IFX_FILE_TO_FILE, (4) FILETOCLOB, (5) LOTOFILE, and (6) DBINFO functions (product defect IDs 171649, 171367, 171387, 171391, 171906, 172179).

IBM Informix Dynamic Database server running on Windows XP with Simple File Sharing enabled, allows remote attackers to bypass authentication and log on to the guest account by supplying an invalid username.