Description
A vulnerability in the update service of Cisco Webex Meetings Desktop App for Windows could allow an authenticated, local attacker to execute arbitrary commands as a privileged user. The vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by invoking the update service command with a crafted argument. An exploit could allow the attacker to run arbitrary commands with SYSTEM user privileges. While the CVSS Attack Vector metric denotes the requirement for an attacker to have local access, administrators should be aware that in Active Directory deployments, the vulnerability could be exploited remotely by leveraging the operating system remote management tools.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cisco | Cisco WebEx Event Center | 33.5.0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 3 modules
-
WebExec Authenticated User Code Execution
exploit/windows/smb/webexec
-
WebEx Local Service Permissions Exploit
exploit/windows/local/webexec
-
WebEx Remote Command Execution Utility
auxiliary/admin/smb/webexec_command
Exploit-DB 2
- WebExec - (Authenticated) User Code Execution (Metasploit) EDB-45695 · remote · Oct 25, 2018 · verified
- WebEx - Local Service Permissions Exploit (Metasploit) EDB-45696 · local · Oct 25, 2018 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20181024 Cisco Webex Meetings Desktop App Update Service Command Injection Vulnerability vendor-advisory
- 105734 vdb-entry
- 45696 exploit
- 1041942 vdb-entry
- 45695 exploit