Description
A vulnerability in the Start Before Logon (SBL) module of Cisco AnyConnect Secure Mobility Client Software for Windows could allow an unauthenticated, local attacker to open Internet Explorer with the privileges of the SYSTEM user. The vulnerability is due to insufficient implementation of the access controls. An attacker could exploit this vulnerability by opening the Internet Explorer browser. An exploit could allow the attacker to use Internet Explorer with the privileges of the SYSTEM user. This may allow the attacker to execute privileged commands on the targeted system. This vulnerability affects versions prior to released versions 4.4.00243 and later and 4.3.05017 and later. Cisco Bug IDs: CSCvc43976.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Cisco AnyConnect Secure Mobility Client Software for Windows Versions prior to released versions 4.4.00243 and later and 4.3.05017 and later. | Cisco AnyConnect Secure Mobility Client Software for Windows Versions prior to released versions 4.4.00243 and later and 4.3.05017 and later. | — |
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.
Exploit-DB 1
- Cisco AnyConnect Secure Mobility Client 4.3.04027 - Local Privilege Escalation EDB-41476 · local · Feb 28, 2017
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170208-anyconnect
- 41476 exploit
- 1037796 vdb-entry
- 96145 vdb-entry