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Cisco Web Security Appliance Privilege Escalation Vulnerability

high Nessus Plugin ID 126916

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco Web Security Appliance (WSA) is affected by following vulnerability

 - A vulnerability in the log subscription subsystem of the Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to perform command injection and elevate privileges to root.The vulnerability is due to insufficient validation of user- supplied input on the web and command-line interface. An attacker could exploit this vulnerability by authenticating to the affected device and injecting scripting commands in the scope of the log subscription subsystem. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root.
 (CVE-2019-1816)

Please see the included Cisco BIDs and Cisco Security Advisory for more information

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvk68106

See Also

http://www.nessus.org/u?de4d6664

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk68106

Plugin Details

Severity: High

ID: 126916

File Name: cisco-sa-20190501-wsa-privesc.nasl

Version: 1.10

Type: local

Family: CISCO

Published: 7/22/2019

Updated: 5/14/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2019-1816

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:asyncos, cpe:/o:cisco:web_security_appliance, cpe:/a:cisco:web_security_appliance, cpe:/h:cisco:web_security_appliance

Required KB Items: Host/AsyncOS/Cisco Web Security Appliance/DisplayVersion, Host/AsyncOS/Cisco Web Security Appliance/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/1/2019

Vulnerability Publication Date: 5/1/2019

Reference Information

CVE: CVE-2019-1816

BID: 108131

CWE: 20

CISCO-SA: cisco-sa-20190501-wsa-privesc

CISCO-BUG-ID: CSCvk68106