Detections
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Cisco AnyConnect Secure Mobility Client DoS (cisco-sa-anyconnect-dos-55AYyxYr)

medium Nessus Plugin ID 148450

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending one or more crafted IPC messages to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. Note: The process under attack will automatically restart so no action is needed by the user or admin.

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 CSCvw29572

See Also

http://www.nessus.org/u?ceee8aef

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw29572

Plugin Details

Severity: Medium

ID: 148450

File Name: cisco-sa-anyconnect-dos-55AYyxYr.nasl

Version: 1.3

Type: local

Agent: windows

Family: Windows

Published: 4/13/2021

Updated: 4/15/2021

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2021-1450

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/a:cisco:anyconnect_secure_mobility_client

Required KB Items: SMB/Registry/Enumerated, installed_sw/Cisco AnyConnect Secure Mobility Client

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2021

Vulnerability Publication Date: 2/24/2021

Reference Information

CVE: CVE-2021-1450