CVE-2022-20737— Cisco Adaptive Security Appliance Software Clientless SSL VPN Heap Overflow Vulnerability
Quick assessment
Affected
Cisco Cisco Adaptive Security Appliance (ASA) Software
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 Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliances(ASA) Software存在安全漏洞，该漏洞源于解析特定 HTTP 身份验证消息时边界检查不足。经过身份验证的远程攻击者可以利用该漏洞在受影响的设备上造成拒绝服务 (DoS) 条件或获取受影响设备的部分进程内存。
Possible ATT&CK Techniques 3 AI
T1005 · Data from Local System T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-20737
Vulnerability Information
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Vulnerability Title
Cisco Adaptive Security Appliance Software Clientless SSL VPN Heap Overflow Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the handler for HTTP authentication for resources accessed through the Clientless SSL VPN portal of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device or to obtain portions of process memory from an affected device. This vulnerability is due to insufficient bounds checking when parsing specific HTTP authentication messages. An attacker could exploit this vulnerability by sending malicious traffic to an affected device acting as a VPN Gateway. To send this malicious traffic, an attacker would need to control a web server that can be accessed through the Clientless SSL VPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition, or to retrieve bytes from the device process memory that may contain sensitive information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Adaptive Security Appliances Software 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliances(ASA) Software存在安全漏洞，该漏洞源于解析特定 HTTP 身份验证消息时边界检查不足。经过身份验证的远程攻击者可以利用该漏洞在受影响的设备上造成拒绝服务 (DoS) 条件或获取受影响设备的部分进程内存。
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 Adaptive Security Appliance (ASA) Software | n/a | - |
|
II. Public POCs for CVE-2022-20737
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2022-20737 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ssl-vpn-heap-zLX3FdX vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2022-05-03 · 19 CVEs total
| CVE-2022-20759 | 8.8 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi |
| CVE-2022-20746 | 8.6 HIGH | Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability |
| CVE-2022-20715 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Remote Ac |
| CVE-2022-20751 | 8.6 HIGH | Cisco Firepower Threat Defense Software Snort Out of Memory Denial of Service Vulnerabilit |
| CVE-2022-20757 | 8.6 HIGH | Cisco Firepower Threat Defense Software Denial of Service Vulnerability |
| CVE-2022-20760 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software DNS Inspe |
| CVE-2022-20767 | 8.6 HIGH | Cisco Firepower Threat Defense Software DNS Enforcement Denial of Service Vulnerability |
| CVE-2022-20745 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi |
| CVE-2022-20742 | 7.4 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKE |
| CVE-2022-20743 | 6.5 MEDIUM | Cisco Firepower Management Center File Upload Security Bypass Vulnerability |
| CVE-2022-20740 | 6.1 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting Vulnerability |
| CVE-2022-20629 | 5.4 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities |
| CVE-2022-20628 | 5.4 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities |
| CVE-2022-20627 | 5.4 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities |
| CVE-2022-20748 | 5.3 MEDIUM | Cisco Firepower Threat Defense Software Local Malware Analysis Denial of Service Vulnerabi |
| CVE-2022-20729 | 4.4 MEDIUM | Cisco Firepower Threat Defense Software XML Injection Vulnerability |
| CVE-2022-20730 | 4.0 MEDIUM | Cisco Firepower Threat Defense Software Security Intelligence DNS Feed Bypass Vulnerabilit |
| CVE-2022-20744 | Cisco Firepower Management Center Software Information Disclosure Vulnerability |
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V. Comments for CVE-2022-20737
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