Rule:--Sid:4136--Summary:This event is generated when an attempt is made to exploit a known vulnerability in Internet Explorer using a JPEG (Joint Photographic Experts Group) format image.--Impact:A successful attack may result in the execution of code of the attackers choosing possibly leading to control of the target machine.--Detailed Information:Internet Explorer does not correctly handle JPEG images. Proper bounds checking of input data is not carried out by the application when processing JPEG images. This can lead to a buffer overflow condition and an opportunity for an attacker to execute code of their choosing.Note:For this rule to generate an event correctly, sid 2706 must be enabled.--Affected Systems:Microsoft Internet Explorer 6.0 SP2 and prior--Attack Scenarios:An attacker can entice a user to visit a web server that will return a malicious JPEG file, perhaps enabling the execution of the malicious code when the file is opened.--Ease of Attack:Simple. Exploit code is publicly available.--False Positives:None known.--False Negatives:None known.--Corrective Action:Upgrade to the latest non-affected version of the software.Apply the appropriate vendor supplied patches as they become available.--Contributors:Sourcefire Vulnerability Research TeamAlex Kirk <akirk@sourcefire.com>Nigel Houghton <nigel.houghton@sourcefire.com>--Additional References--