PT-2019-1378 · Cisco · Cisco Web Security Appliance

Published 2019-02-06 · Updated 2019-10-09 · CVE-2019-1672

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Web Security Appliance versions 10.1.x through 10.5.x

Description The issue is related to the incorrect handling of SSL-encrypted traffic in the Decryption Policy Default Action functionality. This could allow a remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The attacker could exploit this by sending a SSL connection through the affected device, potentially bypassing a configured drop policy to block specific SSL connections.

Recommendations For versions 10.1.x through 10.5.x, consider disabling the Decrypt for End-User Notification feature in the configuration as a temporary workaround to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2019-00740

CVE-2019-1672

Affected Products

Cisco Web Security Appliance

References · 5

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190206-wsa-bypass · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00740 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-1672 · Security Note
• https://osv.dev/vulnerability/CVE-2019-1672 · Vendor Advisory
• http://securityfocus.com/bid/106904 · Note