CVE-2019-1886: A vulnerability in the HTTPS decryption feature of Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of…

PriorityP347high8.6CVSS 3.1

AVNACLPRNUINSCCNINAH

EPSS

1.35%

68.3th percentile

A vulnerability in the HTTPS decryption feature of Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Secure Sockets Layer (SSL) server certificates. An attacker could exploit this vulnerability by installing a malformed certificate in a web server and sending a request to it through the Cisco WSA. A successful exploit could allow the attacker to cause an unexpected restart of the proxy process on an affected device.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
cisco	asyncos	>= 10.5 < 10.5.5-005	10.5.5-005
cisco	asyncos	>= 11.5 < 11.5.2-020	11.5.2-020
cisco	cisco_web_security_appliance	>= unspecified < 10.5.5-005	10.5.5-005
cisco	web_security_appliance	—	—
cisco	web_security_appliance	—	—
cisco	web_security_appliance	—	—
cisco	web_security_appliance_https	—	—

CVSS provenance

nvdv3.18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

nvdv3.08.6HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

vendor_cisco8.6HIGH

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