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Category:   Device (Firewall)  >   Cisco PIX Firewall Vendors:   Cisco
Cisco PIX Firewall Bug in IM Inspection Engine Lets Remote Users Deny Service
SecurityTracker Alert ID:  1020180
SecurityTracker URL:
CVE Reference:   CVE-2008-2057   (Links to External Site)
Date:  Jun 4 2008
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7.2, 8.0, 8.1
Description:   A vulnerability was reported in Cisco PIX Firewall. A remote user can cause denial of service conditions.

A remote user can send specially crafted Instant Messenger (IM) packets through the device to trigger a flaw in the IM inspection engine and to cause the target device to become unavailable.

Systems with the IM inspection engine enabled are affected.

Cisco has assigned Cisco Bug ID CSCso22981 to this vulnerability.

Impact:   A remote user can cause the target device to become unavailable.
Solution:   The vendor has issued a fix (7.2(4), 8.0(3)10, 8.1(1)2).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error

Message History:   None.

 Source Message Contents

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