Main Vulnerability Database Vulnerabilities #VU34082

Input validation error in Cisco AnyConnect Secure Mobility Client - CVE-2020-3434

Published: August 6, 2020 / Updated: September 28, 2020

Vulnerability identifier: #VU34082

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2020-3434

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: Public exploit is available

Vulnerability details

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.

Affected software

Cisco AnyConnect Secure Mobility Client

How to mitigate CVE-2020-3434

Install updates from vendor's website.

Cisco AnyConnect Secure Mobility Client - update to 4.9.00086

Links to Public Exploits and PoC-codes

Exploit #4664 - CVE-2020-3433 (PoCs and technical analysis of three vulnerabilities found on Cisco AnyConnect for Windows: CVE-2020-3433, CVE-2020-3434 and CVE-2020-3435 ) (September 28, 2020)

External References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-feXq4tAV

Related Security Bulletins

Multiple vulnerabilities in Cisco AnyConnect Secure Mobility Client for Windows