CVE-2020-1999

PAN-OS: Threat signatures are evaded by specifically crafted packets

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker to communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets. This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0.

Se presenta una vulnerabilidad en el motor de detección de amenazas basado en firmas de PAN-OS de Palo Alto Network que permite a un atacante comunicarse con dispositivos en la red de una manera que no se analiza en busca de amenazas mediante el envío de datos mediante paquetes TCP específicamente diseñados. Esta técnica evade la detección de amenazas basada en firmas. Este problema afecta a: PAN-OS versiones 8.1 anteriores a 8.1.17; PAN-OS versiones 9.0 anteriores a 9.0.11; PAN-OS versiones 9.1 anteriores a 9.1.5; Todas las versiones de PAN-OS 7.1 y PAN-OS 8.0

*Credits: This issue was found by Vijay Prakash of Palo Alto Networks during internal security review.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-04 CVE Reserved
2020-11-12 CVE Published
2023-07-28 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-754: Improper Check for Unusual or Exceptional Conditions

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.paloaltonetworks.com/CVE-2020-1999	2020-11-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 7.1.0 <= 7.1.26 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 7.1.0 <= 7.1.26"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 8.0.0 <= 8.0.20 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.0.0 <= 8.0.20"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 8.1.0 < 8.1.17 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.1.0 < 8.1.17"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.0.0 < 9.0.11 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.0.0 < 9.0.11"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.1.0 < 9.1.5 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.1.0 < 9.1.5"		-		Affected