CVE-2016-9212 : A vulnerability in the Decrypt for End-User Notification configuration parameter

A vulnerability in the Decrypt for End-User Notification configuration parameter of Cisco AsyncOS Software for Cisco Web Security Appliances could allow an unauthenticated, remote attacker to connect to a secure website over Secure Sockets Layer (SSL) or Transport Layer Security (TLS), even if the WSA is configured to block connections to the website. Affected Products: This vulnerability affects Cisco Web Security Appliances if the HTTPS decryption options are enabled and configured for the device to block connections to certain websites. More Information: CSCvb49012. Known Affected Releases: 9.0.1-162 9.1.1-074.

Published 2016-12-14 00:59:34

Updated 2016-12-22 21:12:09

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2016-9212

Cisco » Web Security Appliance » Version: 9.0.1-162
cpe:2.3:a:cisco:web_security_appliance:9.0.1-162:*:*:*:*:*:*:*
Matching versions
Cisco » Web Security Appliance » Version: 9.1.1-074
cpe:2.3:a:cisco:web_security_appliance:9.1.1-074:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2016-9212

EPSS FAQ

0.19%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 56 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-9212

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2016-9212

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-9212

http://www.securityfocus.com/bid/94774

Cisco Web Security Appliance CVE-2016-9212 Remote Security Bypass Vulnerability
Third Party Advisory;VDB Entry
http://www.securitytracker.com/id/1037410

Cisco Web Security Appliance Input Validation Flaw in 'Decrypt for End-User Notification' Parameter Lets Remote Users Bypass Security Restrictions on the Target System - SecurityTracker
Third Party Advisory;VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-wsa1

Cisco Web Security Appliance Drop Decrypt Policy Bypass Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2016-9212

Products affected by CVE-2016-9212

Exploit prediction scoring system (EPSS) score for CVE-2016-9212

CVSS scores for CVE-2016-9212

CWE ids for CVE-2016-9212

References for CVE-2016-9212