Actively exploited · Published Aug 17, 2020 · Assigned by cisco
CVE-2020-3433Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability
High 7.8 Exploited Ransomware
In plain English
A high-severity uncontrolled search path in Cisco AnyConnect Secure Mobility Client from Cisco. Attackers are actively exploiting it in the wild (listed by CISA on October 24, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 10.0% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 14, 2022.
Official description
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco AnyConnect Secure Mobility Client | n/a |
Weakness: CWE-427 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- 20200805 Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability vendor-advisory, x_refsource_CISCO
- http://packetstormsecurity.com/files/159420/Cisco-AnyConnect-Privilege-Escalation.html x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3433 government-resource