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CVE-2021-3047— PAN-OS: Weak Cryptography Used in Web Interface 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 Web 界面存在安全漏洞，该漏洞源于受影响产品使用了加密弱伪随机数生成器 (PRNG)。经过身份验证的攻击者能够在 PAN-OS 设备上长时间观察他们自己的身份验证秘密，从而模拟另一个经过身份验证的 Web 界面管理员会话。

CVSS 4.2 · Medium EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2021-3047

Vulnerability Information
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Vulnerability Title
PAN-OS: Weak Cryptography Used in Web Interface Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; 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 10.0.4. PAN-OS 10.1 versions are not impacted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用具有密码学弱点缺陷的PRNG
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 安全特征问题漏洞
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 Web 界面存在安全漏洞，该漏洞源于受影响产品使用了加密弱伪随机数生成器 (PRNG)。经过身份验证的攻击者能够在 PAN-OS 设备上长时间观察他们自己的身份验证秘密，从而模拟另一个经过身份验证的 Web 界面管理员会话。
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-2021-3047

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III. Intelligence Information for CVE-2021-3047

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Vendor Advisories for CVE-2021-3047 (1)

Same Patch Batch · Palo Alto Networks · 2021-08-11 · 5 CVEs total

CVE-2021-3050 8.8 HIGH PAN-OS: OS Command Injection Vulnerability in Web Interface
CVE-2021-3046 6.8 MEDIUM PAN-OS: Improper SAML Authentication Vulnerability in GlobalProtect Portal
CVE-2021-3048 5.9 MEDIUM PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage
CVE-2021-3045 4.9 MEDIUM PAN-OS: OS Command Argument Injection in Web Interface

IV. Related Vulnerabilities

Same product: PAN-OS
Same vendor: Palo Alto Networks
Same weakness: CWE-338

V. Comments for CVE-2021-3047

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