CVE-2017-6638 Privilege escalation in Cisco AnyConnect Local Privilege Escalation Vulnerability
Local authenticated attackers can escalate privileges to SYSTEM by exploiting DLL loading flaws in Cisco AnyConnect for Windows.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6638?
CVE-2017-6638 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client, published on 8 Jun 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in how DLL files are loaded with Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to install and run an executable file with privileges equivalent to the Microsoft Windows SYSTEM account. The vulnerability is due to incomplete input validation of path and file names of a DLL file before it is loaded. An attacker could exploit this vulnerability by creating a malicious DLL file and installing it in a specific system directory. A successful exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account. The attacker would need valid user credentials to exploit this vulnerability. This vulnerability affects all Cisco AnyConnect Secure Mobility Client for Windows software versions prior to 4.4.02034. Cisco Bug IDs: CSCvc97928.
Which versions are affected by CVE-2017-6638?
It affects 1 product.
Products include Cisco Anyconnect Secure Mobility Client.
How do I fix CVE-2017-6638?
No fix has been published for CVE-2017-6638 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-6638 being exploited?
There is no known exploitation of CVE-2017-6638 in the wild and no public exploit code.
Other vulnerabilities in Cisco Anyconnect Secure Mobility Client
Sources
Also known as GHSA-g75w-phwm-vjqq.