SB2020080603 - Multiple vulnerabilities in Cisco AnyConnect Secure Mobility Client for Windows

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Main Vulnerability Database SB2020080603

SB2020080603 - Multiple vulnerabilities in Cisco AnyConnect Secure Mobility Client for Windows

Published: August 6, 2020 Updated: October 24, 2022

Security Bulletin ID SB2020080603
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Insecure DLL loading (CVE-ID: CVE-2020-3433)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear


The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and execute arbitrary code on victim's system.


2) Input validation error (CVE-ID: CVE-2020-3434)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear


The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and perform a denial of service (DoS) attack.


3) Input validation error (CVE-ID: CVE-2020-3435)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear


The vulnerability allows a local user to overwrite VPN profiles on the targt device.

The vulnerability exists due to insufficient validation of user-supplied input in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and modify VPN profile files.


Remediation

Install update from vendor's website.

References