Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution (cisco-sa-anyconnect-ipc-KfQO9QhK)

high Nessus Plugin ID 148655

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco AnyConnect Secure Mobility Client is affected by a arbitrary code execution vulnerability. The vulnerability is due to a lack of authentication to the IPC listener. An authenticated, local attacker could exploit this vulnerability by sending crafted IPC messages to the AnyConnect client IPC listener.
A successful exploit could allow an attacker to cause the targeted AnyConnect user to execute a malicious script. This script would execute with the privileges of the targeted AnyConnect user.

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 CSCvv30103

See Also

http://www.nessus.org/u?601e2110

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv30103

Plugin Details

Severity: High

ID: 148655

File Name: cisco-sa-anyconnect-ipc-KfQO9QhK.nasl

Version: 1.3

Type: local

Agent: windows

Family: Windows

Published: 4/15/2021

Updated: 4/19/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2020-3556

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/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: Settings/ParanoidReport, SMB/Registry/Enumerated, installed_sw/Cisco AnyConnect Secure Mobility Client

Exploit Ease: No known exploits are available

Patch Publication Date: 11/4/2020

Vulnerability Publication Date: 11/4/2020

Reference Information

CVE: CVE-2020-3556

CWE: 20

CISCO-SA: cisco-sa-anyconnect-ipc-KfQO9QhK

IAVA: 2020-A-0505-S

CISCO-BUG-ID: CSCvv30103