Description
A vulnerability in the installer component of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated local attacker to copy user-supplied files to system level directories with system level privileges. The vulnerability is due to the incorrect handling of directory paths. An attacker could exploit this vulnerability by creating a malicious file and copying the file to a system directory. An exploit could allow the attacker to copy malicious files to arbitrary locations with system level privileges. This could include DLL pre-loading, DLL hijacking, and other related attacks. To exploit this vulnerability, the attacker needs valid credentials on the Windows system.
CVSS breakdown
CVSS 3.0
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
None
Affected products
- Cisco / Cisco AnyConnect Secure Mobility Clientunspecified – n/a
References
- VENDOR_ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-win-path-traverse-qO4HWBsj
- MAILING_LISThttp://seclists.org/fulldisclosure/2020/Apr/43
- EXPLOIThttp://packetstormsecurity.com/files/157340/Cisco-AnyConnect-Secure-Mobility-Client-4.8.01090-Privilege-Escalation.html
- EXPLOIThttp://packetstormsecurity.com/files/158219/Cisco-AnyConnect-Path-Traversal-Privilege-Escalation.html
- EXPLOIThttp://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.html