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CVE-2019-1884 Details

Description

A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation mechanisms for certain fields in HTTP/HTTPS requests sent through an affected device. A successful attacker could exploit this vulnerability by sending a malicious HTTP/HTTPS request through an affected device. An exploit could allow the attacker to force the device to stop processing traffic, resulting in a DoS condition.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:7.7 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-asyncos-wsa	CVE	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-asyncos-wsa	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	[email protected]
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
cisco asyncos	>= 10.1, < 10.5.5-005 >= 11.5, < 11.5.2-020 >= 11.7, < 11.7.0-407
CPE cpe:2.3:o:cisco:asyncos:::::::: Remediation No remediation found in references.
cisco web security appliance	10.1.4-017 10.5.2-072 11.5.1-fcs-125 11.7.0-256
CPE cpe:2.3:a:cisco:web_security_appliance:10.1.4-017:::::::* cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:::::::* cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-125:::::::* cpe:2.3:a:cisco:web_security_appliance:11.7.0-256:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 9, 2019	CVE Modified	[email protected]
Jul 15, 2019	Initial Analysis	[email protected]