CVE-2020-3191

Description

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.

CvssV3 impact

Version

3.1

VectorString

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

AttackVector

NETWORK

AttackComplexity

LOW

PrivilegesRequired

NONE

UserInteraction

NONE

Scope

CHANGED

ConfidentialityImpact

NONE

IntegrityImpact

NONE

AvailabilityImpact

HIGH

BaseScore

8.6

BaseSeverity

HIGH

CvssV2 impact

Version

2.0

VectorString

AV:N/AC:L/Au:N/C:N/I:N/A:P

AccessVector

NETWORK

AccessComplexity

LOW

Authentication

NONE

ConfidentialityImpact

NONE

IntegrityImpact

NONE

AvailabilityImpact

PARTIAL

BaseScore

5