5.3
MEDIUM
CVE-2020-1999
Palo Alto Network PAN-OS Remote Evasion Vulnerability
Description

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.

INFO

Published Date :

Nov. 12, 2020, 12:15 a.m.

Last Modified :

Nov. 16, 2020, 9:28 p.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-1999 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Paloaltonetworks pan-os
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-1999.

URL Resource
https://security.paloaltonetworks.com/CVE-2020-1999 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-1999 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-1999 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Nov. 16, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    Changed Reference Type https://security.paloaltonetworks.com/CVE-2020-1999 No Types Assigned https://security.paloaltonetworks.com/CVE-2020-1999 Vendor Advisory
    Added CWE NIST CWE-754
    Added CPE Configuration OR *cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* versions from (including) 7.1.0 up to (including) 7.1.26 *cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.0.20 *cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* versions from (including) 8.1.0 up to (excluding) 8.1.17 *cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.11 *cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* versions from (including) 9.1.0 up to (excluding) 9.1.5
  • CVE Modified by [email protected]

    Nov. 12, 2020

    Action Type Old Value New Value
    Changed Description 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. 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.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-1999 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-1999 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.01%

score

0.34588

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability