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CVE-2021-3056— PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication

Quick assessment

Affected
Palo Alto Networks PAN-OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS GlobalProtect Clientless VPN存在安全漏洞，该漏洞源于软件内存处理存在问题导致内存破坏漏洞，这使经过身份验证的攻击者可利用该漏洞能够在SAML身份验证期间使用root用户特权执行任意代码。

CVSS 8.8 · High EPSS 1.54% · P74
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I. Basic Information for CVE-2021-3056

Vulnerability Information
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Vulnerability Title
PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN enables an authenticated attacker to execute arbitrary code with root user privileges during SAML authentication. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1. Prisma Access customers with Prisma Access 2.1 Preferred firewalls are impacted by this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS GlobalProtect Clientless VPN存在安全漏洞，该漏洞源于软件内存处理存在问题导致内存破坏漏洞，这使经过身份验证的攻击者可利用该漏洞能够在SAML身份验证期间使用root用户特权执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Palo Alto Networks PAN-OS 10.1.* -
Palo Alto Networks Prisma Access 2.2 all -

II. Public POCs for CVE-2021-3056

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III. Intelligence Information for CVE-2021-3056

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Vendor Advisories for CVE-2021-3056 (1)

Same Patch Batch · Palo Alto Networks · 2021-11-10 · 8 CVEs total

CVE-2021-3064 9.8 CRITICAL PAN-OS: Memory Corruption Vulnerability in GlobalProtect Portal and Gateway Interfaces
CVE-2021-3058 8.8 HIGH PAN-OS: OS Command Injection Vulnerability in Web Interface XML API
CVE-2021-3062 8.1 HIGH PAN-OS: Improper Access Control Vulnerability Exposing AWS Instance Metadata Endpoint to G
CVE-2021-3060 8.1 HIGH PAN-OS: OS Command Injection in Simple Certificate Enrollment Protocol (SCEP)
CVE-2021-3059 8.1 HIGH PAN-OS: OS Command Injection Vulnerability When Performing Dynamic Updates
CVE-2021-3063 7.5 HIGH PAN-OS: Denial-of-Service (DoS) Vulnerability in GlobalProtect Portal and Gateway Interfac
CVE-2021-3061 6.4 MEDIUM PAN-OS: OS Command Injection Vulnerability in the Command Line Interface (CLI)

IV. Related Vulnerabilities

Same product: PAN-OS
Same vendor: Palo Alto Networks
Same weakness: CWE-120

V. Comments for CVE-2021-3056

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