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CVE-2021-3055— PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface

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存在安全漏洞，该漏洞源于网络系统或组件的使用过程中存在不合理的文件配置、参数配置等。

CVSS 6.5 · Medium EPSS 1.07% · P64
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I. Basic Information for CVE-2021-3055

Vulnerability Information
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Vulnerability Title
PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface
Source: CVE Program / CVE List V5
Vulnerability Description
An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. 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 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 代码问题漏洞
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存在安全漏洞，该漏洞源于网络系统或组件的使用过程中存在不合理的文件配置、参数配置等。
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.* -

II. Public POCs for CVE-2021-3055

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III. Intelligence Information for CVE-2021-3055

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Vendor Advisories for CVE-2021-3055 (1)

Same Patch Batch · Palo Alto Networks · 2021-09-08 · 6 CVEs total

CVE-2021-3051 8.1 HIGH Cortex XSOAR: Authentication Bypass in SAML Authentication
CVE-2021-3052 8.0 HIGH PAN-OS: Reflected Cross-Site Scripting (XSS) in Web Interface
CVE-2021-3053 7.5 HIGH PAN-OS: Exceptional Condition Denial-of-Service (DoS)
CVE-2021-3054 7.2 HIGH PAN-OS: Unsigned Code Execution During Plugin Installation Race Condition Vulnerability
CVE-2021-3049 2.6 LOW Cortex XSOAR: Improper Authorization of Incident Investigations Vulnerability

IV. Related Vulnerabilities

Same product: PAN-OS
Same vendor: Palo Alto Networks
Same weakness: CWE-611

V. Comments for CVE-2021-3055

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