snomControl.swf in the central phone server for the Snom 320 SIP Phone allows remote attackers to cause a denial of service (application crash and corruption of call logs) via a "'); (double quote, quote, close parenthesis, semicolon) sequence in the "Call a number" field.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.