CVE-2020-3556: Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability
First published: Fri Nov 06 2020(Updated: )
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client Software could allow an authenticated, local attacker to cause a targeted AnyConnect user to execute a malicious script. The vulnerability is due to a lack of authentication to the IPC listener. An attacker could exploit this vulnerability by sending crafted IPC messages to the AnyConnect client IPC listener. A successful exploit could allow an attacker to cause the targeted AnyConnect user to execute a script. This script would execute with the privileges of the targeted AnyConnect user. In order to successfully exploit this vulnerability, there must be an ongoing AnyConnect session by the targeted user at the time of the attack. To exploit this vulnerability, the attacker would also need valid user credentials on the system upon which the AnyConnect client is being run. Cisco has not released software updates that address this vulnerability.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Anyconnect Secure Mobility Client | =4.9\(3052\) | |
| Cisco Anyconnect Secure Mobility Client | =98.145\(86\) |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco AnyConnect vulnerability?
The vulnerability ID for this Cisco AnyConnect vulnerability is CVE-2020-3556.
What is the title of the vulnerability?
The title of the vulnerability is 'A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility...'
What is the severity rating of CVE-2020-3556?
The severity rating of CVE-2020-3556 is high with a score of 7.3.
What software is affected by this vulnerability?
The Cisco AnyConnect Secure Mobility Client Software versions 4.9(3052) and 98.145(86) are affected by this vulnerability.
How can an attacker exploit this vulnerability?
An authenticated, local attacker can exploit this vulnerability by causing a targeted AnyConnect user to execute a malicious script.
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