What’s Vulnerable › Vulnerabilities
CVE-2020-3254: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Media Gateway Control Protocol Denial of Service Vulnerabilities
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-05-06 · updated 2026-08-11
- Weakness: CWE-400
Description
Multiple vulnerabilities in the Media Gateway Control Protocol (MGCP) inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerabilities are due to inefficient memory management. An attacker could exploit these vulnerabilities by sending crafted MGCP packets through an affected device. An exploit could allow the attacker to cause memory exhaustion resulting in a restart of an affected device, causing a DoS condition for traffic traversing the device.
Affected products
- Cisco ASA Software: from 9.6 before 9.6.4.34; from 9.8 before 9.8.4.7; from 9.9 before 9.9.2.66; from 9.10 before 9.10.1.27; from 9.12 before 9.12.2.1 — fixed in 9.10.1.27, 9.12.2.1, 9.6.4.34, 9.8.4.7, 9.9.2.66
- Cisco Asa 5505 Firmware: 9.10(1.3)
- Cisco Asa 5510 Firmware: 9.10(1.3)
- Cisco Asa 5512-X Firmware: 9.10(1.3)
- Cisco Asa 5515-X Firmware: 9.10(1.3)
- Cisco Asa 5520 Firmware: 9.10(1.3)
- Cisco Asa 5525-X Firmware: 9.10(1.3)
- Cisco Asa 5540 Firmware: 9.10(1.3)
- Cisco Asa 5545-X Firmware: 9.10(1.3)
- Cisco Asa 5550 Firmware: 9.10(1.3)
- Cisco Asa 5555-X Firmware: 9.10(1.3)
- Cisco Asa 5580 Firmware: 9.10(1.3)
- Cisco Asa 5585-X Firmware: 9.10(1.3)
- Cisco Firepower Threat Defense Software: from 6.2.3 before 6.2.3.16; from 6.3.0 before 6.3.0.6; from 6.4.0 before 6.4.0.4 — fixed in 6.2.3.16, 6.3.0.6, 6.4.0.4
How to fix
Upgrade to a fixed version: Cisco ASA Software 9.10.1.27, 9.12.2.1, 9.6.4.34, 9.8.4.7; Cisco Firepower Threat Defense Software 6.2.3.16, 6.3.0.6, 6.4.0.4. Check the vendor advisory for mitigations.
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-mgcp-SUqB8VKH
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-mgcp-SUqB8VKH
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