CVE-2020-3528

HIGH

Cisco ASA <9.6 & FTD <6.3.0.6 - DoS via OSPFv2 LLS Packet

Title source: llm
STIX 2.1

Description

A vulnerability in the OSPF Version 2 (OSPFv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete input validation when the affected software processes certain OSPFv2 packets with Link-Local Signaling (LLS) data. An attacker could exploit this vulnerability by sending a malformed OSPFv2 packet to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.

References (1)

Core 1
Core References

Scores

CVSS v3 8.6
EPSS 0.0091
EPSS Percentile 76.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (3)
cisco/adaptive_security_appliance < 9.6
cisco/adaptive_security_appliance_software 9.8.0 - 9.8.4.26
cisco/firepower_threat_defense < 6.3.0.6
Published Oct 21, 2020
Tracked Since Feb 18, 2026