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CVE-2020-3529

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
21/10/2020
Last modified:
07/11/2023

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* 9.6.4.45 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 6.3.0.6 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 6.4.0 (including) 6.4.0.10 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 6.5.0 (including) 6.5.0.5 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 6.6.0 (including) 6.6.1 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.8.0 (including) 9.8.4.29 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.9.0 (including) 9.9.2.80 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.10.0 (including) 9.10.1.44 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.12.0 (including) 9.12.4.4 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.13.0 (including) 9.13.1.13 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.14.0 (including) 9.14.1.30 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools