Cisco Web Security Appliance Decryption Policy Bypass Vulnerability (Cisco Cisco Web Security Appliance (WSA))
At a glance
- Source
- NVD
- EPSS
- EPSS 1.65 % · percentile 76 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 5.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | cisco |
| CVSS 3.0 | MEDIUM 5.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
| CVSS 3.0 | MEDIUM 5.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-10229
- GCVE · GCVE-0-2019-1672
Affected configurations (NVD CPE)
cpe:2.3:a:cisco:web_security_appliance:10.1.0-204:*:*:*:*:*:*:*cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:*:*:*:*:*:*:*cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-115:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Web Security Appliance (WSA) | affected 10.1 ; affected 10.5 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |