This issue occurs due to the presence of Cisco bug ID CSCse52050.
The problem occurs when Cisco PIX or ASA that runs software release 7.0, 7.1, or 7.2 configured with a very large access-list applied to either a nat statement or a Crypto Match statement.
For a workaround, download and upgrade the software to any of these versions:
Refer to Cisco PIX Security Appliance Software and Cisco Adaptive Security Appliance Software in order to download software for PIX and ASA.
Open a case with Cisco Technical Support with the TAC Service Request Tool in order to download software version 8.3 and for more assistance with this issue.