Code execution in Cisco AnyConnect Secure Mobility Client

1) Input validation error

EUVDB-ID: #VU48149

Risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-3556

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a lack of authentication to the interprocess communication (IPC) channel listener. A local user can send specially crafted IPC messages to the AnyConnect client IPC listener and cause the targeted AnyConnect user to execute a script.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.9.3052 - 98.145.86

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-ipc-KfQO9QhK

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.