CVE-2021-40117
Description
A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
How to fix
- cisco adaptive_security_appliance9.8.4.40 or later
- cisco secure_firewall_threat_defense6.2.3.17, 6.4.0.13, 6.6.5, 6.7.0.3, 7.0.1 or later
- cisco adaptive_security_appliance_software9.12.4.26, 9.14.3.9, 9.15.1.17, 9.16.2.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco adaptive_security_appliance | v < 9.8.4.40 | 9.8.4.40 |
| cisco secure_firewall_threat_defense | v < 6.2.3.17, 6.3.0 ≤ v < 6.4.0.13, 6.5.0 ≤ v < 6.6.5, 6.7.0 ≤ v < 6.7.0.3, 7.0.0 ≤ v < 7.0.1 | 6.2.3.17, 6.4.0.13, 6.6.5, 6.7.0.3, 7.0.1 |
| cisco adaptive_security_appliance_software | 9.9.0 ≤ v < 9.12.4.26, 9.13.0 ≤ v < 9.14.3.9, 9.15.0 ≤ v < 9.15.1.17, 9.16.0 ≤ v < 9.16.2.3 | 9.12.4.26, 9.14.3.9, 9.15.1.17, 9.16.2.3 |
| cisco asa_5512-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5505_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5515-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5525-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5545-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5555-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5580_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
| cisco asa_5585-x_firmware | 009.009\(002.085\), 009.014\(002.106\) | — |
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