Resource exhaustion in Cisco Web Security Appliance (Wsa)
CVE-2019-1672
A vulnerability in the Decryption Policy Default Action functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The vulnerability is due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. An attacker could exploit this vulnerability by sending a SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured drop policy to block specific SSL connections. Releases 10.1.x and 10.5.x are affected.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.016 (74.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
Affected products
- Cisco Web Security Appliance (Wsa) — versions 10.1, 10.5
- Cisco Web_security_appliance — versions 10.1.0-204, 10.5.2-072, 11.5.1-fcs-115
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Third Party Advisory)
- psirt@cisco.com (Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2019-1672?
- CVE-2019-1672 is a medium-severity vulnerability in Cisco Web Security Appliance (Wsa), classified under Uncontrolled Resource Consumption. CVSS score: 5.8/10. Published 2019-02-08.
- How severe is CVE-2019-1672?
- Medium severity. CVSS v3 base score is 5.8 out of 10.