CVE-2019-1817: Cisco Web Security Appliance Malformed Request Denial of Service Vulnerability
First published: Fri May 03 2019(Updated: )
A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of HTTP and HTTPS requests. An attacker could exploit this vulnerability by sending a malformed HTTP or HTTPS request to an affected device. An exploit could allow the attacker to cause a restart of the web proxy process, resulting in a temporary DoS condition.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Web Security Appliance | =11.5.1-fcs-115 | |
| Cisco Web Security Appliance | =11.5.1-fcs-124 | |
| Cisco Web Security Appliance | =11.5.1-fcs-125 | |
| Cisco Web Security Appliance | =11.7.0-fcs-334 | |
| =11.5.1-fcs-115 | ||
| =11.5.1-fcs-124 | ||
| =11.5.1-fcs-125 | ||
| =11.7.0-fcs-334 |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1817?
CVE-2019-1817 is a vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance.
What is the severity of CVE-2019-1817?
CVE-2019-1817 has a severity rating of 7.5 (High).
How does CVE-2019-1817 impact Cisco Web Security Appliance?
CVE-2019-1817 can cause a denial of service (DoS) condition on an affected Cisco Web Security Appliance device.
Are there any affected versions of Cisco Web Security Appliance?
Yes, Cisco Web Security Appliance versions 11.5.1-fcs-115, 11.5.1-fcs-124, 11.5.1-fcs-125, and 11.7.0-fcs-334 are affected.
How can I fix CVE-2019-1817?
To fix CVE-2019-1817, it is recommended to apply the necessary patches provided by Cisco.
- collector/nvd-index
- agent/type
- agent/references
- agent/title
- agent/weakness
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/tags
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- vendor/cisco
- canonical/cisco web security appliance
- version/cisco web security appliance/11.5.1-fcs-115
- version/cisco web security appliance/11.5.1-fcs-124
- version/cisco web security appliance/11.5.1-fcs-125
- version/cisco web security appliance/11.7.0-fcs-334