PT-2019-2643 · Cisco · Cisco Web Security Appliance

Published 2019-07-03 · Updated 2020-10-16 · CVE-2019-1886

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco Web Security Appliance (WSA) (affected versions not specified)

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

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Improper Certificate Validation

Weakness Enumeration

CWE-20

CWE-295

Related Identifiers

BDU:2019-02529

CVE-2019-1886

Affected Products

Cisco Web Security Appliance

References · 7

• https://osv.dev/vulnerability/CVE-2019-1886 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-wsa-dos · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-1886 · Security Note
• https://bdu.fstec.ru/vul/2019-02529 · Security Note
• http://securityfocus.com/bid/109049 · Note
• https://tools.cisco.com/security/center/publicationListing.x · Note
• https://t.me/cvenotify/203 · Telegram Post