| Package | Affected versions | Patched versions |
|---|---|---|
| adaptive security appliance | < 9.6.4.43 | 9.6.4.43 |
| secure firewall threat defense | = 6.6.0≥ 6.3.0, < 6.3.0.6≥ 6.4.0, < 6.4.0.10≥ 6.5.0, < 6.5.0.5≤ 6.2.2 | 6.3.0.66.4.0.106.5.0.5 |
A vulnerability in the SIP inspection process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a watchdog timeout and crash during the cleanup of threads that are associated with a SIP connection that is being deleted from the connection list. An attacker could exploit this vulnerability by sending a high rate of crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a watchdog timeout and crash, resulting in a crash and reload of the affected device.
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