CVE-2020-3529
Description
A vulnerability in the SSL VPN negotiation process for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to inefficient direct memory access (DMA) memory management during the negotiation phase of an SSL VPN connection. An attacker could exploit this vulnerability by sending a steady stream of crafted Datagram TLS (DTLS) traffic to an affected device. A successful exploit could allow the attacker to exhaust DMA memory on the device and cause a DoS condition.
How to fix
- cisco adaptive_security_appliance9.6.4.45 or later
- cisco secure_firewall_threat_defense6.3.0.6, 6.4.0.10, 6.5.0.5, 6.6.1 or later
- cisco adaptive_security_appliance_software9.8.4.29, 9.9.2.80, 9.10.1.44, 9.12.4.4, 9.13.1.13, 9.14.1.30 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco adaptive_security_appliance | v < 9.6.4.45 | 9.6.4.45 |
| cisco secure_firewall_threat_defense | v < 6.3.0.6, 6.4.0 ≤ v < 6.4.0.10, 6.5.0 ≤ v < 6.5.0.5, 6.6.0 ≤ v < 6.6.1 | 6.3.0.6, 6.4.0.10, 6.5.0.5, 6.6.1 |
| cisco adaptive_security_appliance_software | 9.8.0 ≤ v < 9.8.4.29, 9.9.0 ≤ v < 9.9.2.80, 9.10.0 ≤ v < 9.10.1.44, 9.12.0 ≤ v < 9.12.4.4, 9.13.0 ≤ v < 9.13.1.13, 9.14.0 ≤ v < 9.14.1.30 | 9.8.4.29, 9.9.2.80, 9.10.1.44, 9.12.4.4, 9.13.1.13, 9.14.1.30 |
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Attack Surface Management
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