7.8
CVSSv3

CVE-2017-6638

Published: 08/06/2017 Updated: 03/10/2019
CVSS v2 Base Score: 7.2 | Impact Score: 10 | Exploitability Score: 3.9
CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8
VMScore: 641
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Summary

A vulnerability in how DLL files are loaded with Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local malicious user to install and run an executable file with privileges equivalent to the Microsoft Windows SYSTEM account. The vulnerability is due to incomplete input validation of path and file names of a DLL file before it is loaded. An attacker could exploit this vulnerability by creating a malicious DLL file and installing it in a specific system directory. A successful exploit could allow the malicious user to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account. The attacker would need valid user credentials to exploit this vulnerability. This vulnerability affects all Cisco AnyConnect Secure Mobility Client for Windows software versions before 4.4.02034. Cisco Bug IDs: CSCvc97928.

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cisco anyconnect secure mobility client

Vendor Advisories

A vulnerability in how DLL files are loaded with Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to install and run an executable file with privileges equivalent to the Microsoft Windows SYSTEM account The vulnerability is due to incomplete input validation of path and file names of a DLL file bef ...

Github Repositories

Pwn any Anyconnect (except those patched).

AnyPwn Pwn any Anyconnect (except those patched) This repo summarizes the fun I had playing with Cisco Anyconnect VPN Mobility Client It's more like a framework to craft malicious CIPC messages and fuzz the vpnserviceexe Hope to get back to this one day My take on CVE-2020-3153 implements a slight difference in payload to evade Symantec HIPS Exploits implemented so f