Insecure DLL loading in Cisco AnyConnect Secure Mobility Client for Windows

1) Insecure DLL loading

EUVDB-ID: #VU25487

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-3153

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

Exploit availability: Yes

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to the incorrect handling of directory paths in the installer component. A local user can create a malicious file, copy the file to a system directory and copy malicious files to arbitrary locations with system level privileges. This can include DLL pre-loading, DLL hijacking, and other related attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: before 4.8.02042

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-win-path-traverse-qO4HWBsj

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?

Yes. This vulnerability is being exploited in the wild.