CVE-2022-20737: Cisco Adaptive Security Appliance Software Clientless SSL VPN Heap Overflow Vulnerability
First published: Tue May 03 2022(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance Software | <9.12.4.38 | |
| Cisco Adaptive Security Appliance Software | >=9.13.0<9.14.4 | |
| Cisco Adaptive Security Appliance Software | >=9.15.0<9.15.1.21 | |
| Cisco Adaptive Security Appliance Software | >=9.16.0<9.16.2.14 | |
| Cisco Adaptive Security Appliance Software | >=9.17.0<9.17.1.7 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2022-20737?
CVE-2022-20737 is a vulnerability in the handler for HTTP authentication for resources accessed through the Clientless SSL VPN portal of Cisco Adaptive Security Appliance (ASA) Software.
What is the severity of CVE-2022-20737?
The severity of CVE-2022-20737 is high with a CVSS score of 7.1.
How does CVE-2022-20737 affect Cisco Adaptive Security Appliance (ASA) Software?
CVE-2022-20737 affects Cisco Adaptive Security Appliance (ASA) Software versions 9.12.4.38 to 9.17.1.7.
What is the impact of CVE-2022-20737?
CVE-2022-20737 could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device or to obtain portions of device memory.
How can I fix CVE-2022-20737?
To fix CVE-2022-20737, users should update to the latest version of Cisco ASA Software as provided by Cisco.
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/severity
- agent/last-modified-date
- agent/title
- agent/author
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco adaptive security appliance software
- version/cisco adaptive security appliance software/9.13.0
- version/cisco adaptive security appliance software/9.15.0
- version/cisco adaptive security appliance software/9.16.0
- version/cisco adaptive security appliance software/9.17.0