CVE-2020-2021

KEV
Published: Giu 29, 2020 Last Modified: Nov 04, 2025
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 10,0
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
HIGH 9,3
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete

Description

AI Translation Available

When Security Assertion Markup Language (SAML) authentication is enabled and the 'Validate Identity Provider Certificate' option is disabled (unchecked), improper verification of signatures in PAN-OS SAML authentication enables an unauthenticated network-based attacker to access protected resources. The attacker must have network access to the vulnerable server to exploit this vulnerability. This issue affects PAN-OS 9.1 versions earlier than PAN-OS 9.1.3; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15, and all versions of PAN-OS 8.0 (EOL). This issue does not affect PAN-OS 7.1. This issue cannot be exploited if SAML is not used for authentication. This issue cannot be exploited if the 'Validate Identity Provider Certificate' option is enabled (checked) in the SAML Identity Provider Server Profile. Resources that can be protected by SAML-based single sign-on (SSO) authentication are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN, Authentication and Captive Portal, PAN-OS next-generation firewalls (PA-Series, VM-Series) and Panorama web interfaces, Prisma Access In the case of GlobalProtect Gateways, GlobalProtect Portal, Clientless VPN, Captive Portal, and Prisma Access, an unauthenticated attacker with network access to the affected servers can gain access to protected resources if allowed by configured authentication and Security policies. There is no impact on the integrity and availability of the gateway, portal or VPN server. An attacker cannot inspect or tamper with sessions of regular users. In the worst case, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N). In the case of PAN-OS and Panorama web interfaces, this issue allows an unauthenticated attacker with network access to the PAN-OS or Panorama web interfaces to log in as an administrator and perform administrative actions. In the worst-case scenario, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). If the web interfaces are only accessible to a restricted management network, then the issue is lowered to a CVSS Base Score of 9.6 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,1687
Percentile
0,9th
Updated

EPSS Score Trend (Last 90 Days)

347

Improper Verification of Cryptographic Signature

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Integrity Confidentiality
Potential Impacts:
Gain Privileges Or Assume Identity Modify Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
All platforms may be affected
View CWE Details
Operating System

Pan-Os by Paloaltonetworks

Product Information
Vendor Paloaltonetworks
Product Pan-Os
Version Range Affected
From 8.0.0 (inclusive)
To 8.0.20 (inclusive)
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Pan-Os by Paloaltonetworks

Product Information
Vendor Paloaltonetworks
Product Pan-Os
Version Range Affected
From 9.1.0 (inclusive)
To 9.1.3 (exclusive)
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Pan-Os by Paloaltonetworks

Product Information
Vendor Paloaltonetworks
Product Pan-Os
Version Range Affected
From 8.1.0 (inclusive)
To 8.1.15 (exclusive)
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Pan-Os by Paloaltonetworks

Product Information
Vendor Paloaltonetworks
Product Pan-Os
Version Range Affected
From 9.0.0 (inclusive)
To 9.0.9 (exclusive)
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020…
https://security.paloaltonetworks.com/CVE-2020-2021
https://security.paloaltonetworks.com/CVE-2020-2021
https://security.paloaltonetworks.com/CVE-2020-2021
https://security.paloaltonetworks.com/CVE-2020-2021