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CVE-2020-1992— PAN-OS on PA-7000 Series: Varrcvr daemon network-based denial of service or privilege escalation

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中的PAN-OS 9.0.7之前的9.0版本和9.1.2之前的9.1版本的Varrcvr守护程序存在格式化字符串错误漏洞。远程攻击者可利用该漏洞导致守护程序崩溃或可能以root权限执行代码。

CVSS 8.1 · High EPSS 3.45% · P89
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I. Basic Information for CVE-2020-1992

Vulnerability Information
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Vulnerability Title
PAN-OS on PA-7000 Series: Varrcvr daemon network-based denial of service or privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
A format string vulnerability in the Varrcvr daemon of PAN-OS on PA-7000 Series devices with a Log Forwarding Card (LFC) allows remote attackers to crash the daemon creating a denial of service condition or potentially execute code with root privileges. This issue affects Palo Alto Networks PAN-OS 9.0 versions before 9.0.7; PAN-OS 9.1 versions before 9.1.2 on PA-7000 Series devices with an LFC installed and configured. This issue requires WildFire services to be configured and enabled. This issue does not affect PAN-OS 8.1 and earlier releases. This issue does not affect any other PA Series firewalls.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部控制的格式字符串
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 格式化字符串错误漏洞
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中的PAN-OS 9.0.7之前的9.0版本和9.1.2之前的9.1版本的Varrcvr守护程序存在格式化字符串错误漏洞。远程攻击者可利用该漏洞导致守护程序崩溃或可能以root权限执行代码。
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 9.0 ~ 9.0.7 -
Palo Alto Networks PAN-OS 8.1.* -

II. Public POCs for CVE-2020-1992

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III. Intelligence Information for CVE-2020-1992

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Vendor Advisories for CVE-2020-1992 (1)

Same Patch Batch · Palo Alto Networks · 2020-04-08 · 7 CVEs total

CVE-2020-1991 7.8 HIGH Traps: Insecure temporary file vulnerability may allow privilege escalation on Windows
CVE-2020-1990 7.2 HIGH PAN-OS: Buffer overflow in the management server
CVE-2020-1989 7.0 HIGH Global Protect Agent: Incorrect privilege assignment allows local privilege escalation
CVE-2020-1978 5.8 MEDIUM VM-Series on Microsoft Azure: Inadvertent collection of credentials in Tech support files
CVE-2020-1988 4.2 MEDIUM Global Protect Agent: Local privilege escalation due to an unquoted search path vulnerabil
CVE-2020-1987 3.9 LOW Global Protect Agent: VPN cookie local information disclosure

IV. Related Vulnerabilities

Same product: PAN-OS
Same vendor: Palo Alto Networks
Same weakness: CWE-134

V. Comments for CVE-2020-1992

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