National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-1884 Detail

Current Description

A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation mechanisms for certain fields in HTTP/HTTPS requests sent through an affected device. A successful attacker could exploit this vulnerability by sending a malicious HTTP/HTTPS request through an affected device. An exploit could allow the attacker to force the device to stop processing traffic, resulting in a DoS condition.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 6.5 MEDIUM
Vector: AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 2.8


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 4.0 MEDIUM
Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): Single
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-asyncos-wsa Vendor Advisory

Technical Details

Vulnerability Type (View All)

  • Improper Input Validation (CWE-20)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
10.1
Up to (excluding)
10.5.5-005
 cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
11.5
Up to (excluding)
11.5.2-020
 cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
11.7
Up to (excluding)
11.7.0-407

Configuration 2 ( hide )
 cpe:2.3:a:cisco:web_security_appliance:10.1.4-017:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-125:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:cisco:web_security_appliance:11.7.0-256:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-1884
NVD Published Date:
07/04/2019
NVD Last Modified:
07/15/2019