CVE-2022-20805— Cisco Umbrella Secure Web Gateway File Decryption Bypass Vulnerability
Quick assessment
Affected
Cisco Cisco Umbrella Insights Virtual Appliance
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.
Cisco Umbrella是美国思科（Cisco）公司的一套云安全平台。该平台能够预防网络钓鱼、恶意软件和勒索软件等网络威胁。 Cisco Umbrella Secure Web Gateway (SWG) 中存在安全漏洞，攻击者可以通过从客户端通过 TLS 向未知或受控 URL 发送精心设计的请求来绕过 Cisco Umbrella SWG 的解密过程，并允许将恶意内容下载到受保护网络上的主机。
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I. Basic Information for CVE-2022-20805
Vulnerability Information
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Vulnerability Title
Cisco Umbrella Secure Web Gateway File Decryption Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the automatic decryption process in Cisco Umbrella Secure Web Gateway (SWG) could allow an authenticated, adjacent attacker to bypass the SSL decryption and content filtering policies on an affected system. This vulnerability is due to how the decryption function uses the TLS Sever Name Indication (SNI) extension of an HTTP request to discover the destination domain and determine if the request needs to be decrypted. An attacker could exploit this vulnerability by sending a crafted request over TLS from a client to an unknown or controlled URL. A successful exploit could allow an attacker to bypass the decryption process of Cisco Umbrella SWG and allow malicious content to be downloaded to a host on a protected network. There are workarounds that address this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Umbrella 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Umbrella是美国思科（Cisco）公司的一套云安全平台。该平台能够预防网络钓鱼、恶意软件和勒索软件等网络威胁。 Cisco Umbrella Secure Web Gateway (SWG) 中存在安全漏洞，攻击者可以通过从客户端通过 TLS 向未知或受控 URL 发送精心设计的请求来绕过 Cisco Umbrella SWG 的解密过程，并允许将恶意内容下载到受保护网络上的主机。
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 |
|---|---|---|---|---|
| Cisco | Cisco Umbrella Insights Virtual Appliance | n/a | - |
|
II. Public POCs for CVE-2022-20805
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2022-20805 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uswg-fdbps-xtTRKpp6 vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2022-04-21 · 12 CVEs total
| CVE-2022-20732 | 7.8 HIGH | Cisco Virtualized Infrastructure Manager Privilege Escalation Vulnerability |
| CVE-2022-20783 | 7.5 HIGH | Cisco TelePresence Collaboration Endpoint and RoomOS Software H.323 Denial of Service Vuln |
| CVE-2022-20773 | 7.5 HIGH | Cisco Umbrella Virtual Appliance Static SSH Host Key Vulnerability |
| CVE-2022-20790 | 6.5 MEDIUM | Cisco Unified Communications Products Arbitrary File Read Vulnerability |
| CVE-2022-20778 | 6.1 MEDIUM | Cisco Webex Meetings Cross-Site Scripting Vulnerability |
| CVE-2022-20788 | 6.1 MEDIUM | Cisco Unified Communications Products Cross-Site Scripting Vulnerability |
| CVE-2022-20795 | 5.8 MEDIUM | Cisco Adaptive Security Appliance and Cisco Firepower Threat Defense Software AnyConnect S |
| CVE-2022-20787 | 5.7 MEDIUM | Cisco Unified Communications Products Cross-Site Request Forgery Vulnerability |
| CVE-2022-20786 | 5.4 MEDIUM | Cisco Unified Communications Manager IM & Presence Service SQL Injection Vulnerability |
| CVE-2022-20804 | 5.3 MEDIUM | Cisco Unified Communications Products Denial of Service Vulnerability |
| CVE-2022-20789 | 4.9 MEDIUM | Cisco Unified Communications Products Arbitrary File Write Vulnerability |
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V. Comments for CVE-2022-20805
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