CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

A vulnerability has been found in Cisco Web Security Appliance 8.5/8.6/8.7/8.8/9.1 (Anti-Malware Software) and classified as critical. Affected by this vulnerability is an unknown code block of the component Cached File Handler. The manipulation with an unknown input leads to a resource management vulnerability (Memory). The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

Memory leak in Cisco AsyncOS 8.5 through 9.0 before 9.0.1-162 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via an HTTP file-range request for cached content, aka Bug ID CSCuw97270.

The weakness was disclosed 05/18/2016 with Cisco as cisco-sa-20160518-wsa2 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2016-1381 since 01/04/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 91338 (Cisco Web Security Appliance Multiple DoS Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l.

Upgrading to version 9.0.1-162 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91338). The entries 87546, 87548 and 87549 are pretty similar.

Productinfo

Type

• Anti-Malware Software

Vendor

• Cisco

Name

• Web Security Appliance

Version

• 8.5
• 8.6
• 8.7
• 8.8
• 9.1

License

• commercial

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Resource management / Memory
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 91338
Nessus Name: Cisco Web Security Appliance Multiple DoS Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802919
OpenVAS Name: Cisco WSA Multiple Vulnerabillities 05/16
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Web Security Appliance 9.0.1-162

Timelineinfo

01/04/2016 🔍
05/18/2016 +135 days 🔍
05/18/2016 +0 days 🔍
05/18/2016 +0 days 🔍
05/20/2016 +2 days 🔍
05/24/2016 +4 days 🔍
05/26/2016 +2 days 🔍
12/05/2018 +923 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20160518-wsa2
Organization: Cisco
Status: Confirmed

CVE: CVE-2016-1381 (🔍)
SecurityTracker: 1035909
SecurityFocus: 90742

See also: 🔍

Entryinfo

Created: 05/20/2016 10:32
Updated: 12/05/2018 09:37
Changes: 05/20/2016 10:32 (72), 12/05/2018 09:37 (8)
Complete: 🔍
Cache ID: 18:A08:103

Discussion

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