CVE-2020-3254

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Media Gateway Control Protocol Denial of Service Vulnerabilities

HIGH
7.5
CVSS Score
Published: May 6, 2020 at 04:41 PM UTC
Updated: August 11, 2026 at 07:33 PM UTC
26 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseASA 5512-x Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

9.10 ≤ v < 9.10.1.279.12 ≤ v < 9.12.2.19.6 ≤ v < 9.6.4.349.8 ≤ v < 9.8.4.79.9 ≤ v < 9.9.2.66
Affected range stops below 9.10.1.27, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.12.2.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.6.4.34, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.8.4.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.9.2.66, so it looks safe — our inference, not a vendor statement
cisco-asa-5505 (same device)
cisco-asa-5510 (same device)
cisco-asa-5512-x (same device)
cisco-asa-5515-x (same device)
cisco-asa-5520 (same device)
cisco-asa-5525-x (same device)
cisco-asa-5540 (same device)
cisco-asa-5545-x (same device)
cisco-asa-5550 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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