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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.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-win-path-traverse-qO4HWBsj vendor-advisoryx_refsource_CISCO
• http://seclists.org/fulldisclosure/2020/Apr/43 mailing-listx_refsource_FULLDISC
• http://packetstormsecurity.com/files/157340/Cisco-AnyConnect-Secure-Mobility-Client-4.8.01090-Privilege-Escalation.html x_refsource_MISC
• http://packetstormsecurity.com/files/158219/Cisco-AnyConnect-Path-Traversal-Privilege-Escalation.html x_refsource_MISC
• http://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.html x_refsource_MISC
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3153 government-resource