CVE-2020-3596: Cisco Expressway Series and TelePresence Video Communication Server Denial of Service Vulnerability
First published: Thu Oct 08 2020(Updated: )
A vulnerability in the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of incoming SIP traffic. An attacker could exploit this vulnerability by sending a series of SIP packets to an affected device. A successful exploit could allow the attacker to exhaust memory on an affected device, causing it to crash and leading to a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Expressway | <=x12.6.3 | |
| Cisco TelePresence Video Communication Server | <=x12.6.3 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3596?
CVE-2020-3596 is a vulnerability in the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
What is the severity of CVE-2020-3596?
The severity of CVE-2020-3596 is high with a CVSS severity score of 7.5.
How does CVE-2020-3596 affect Cisco Expressway Series?
CVE-2020-3596 affects Cisco Expressway Series versions up to and including x12.6.3.
How does CVE-2020-3596 affect Cisco TelePresence Video Communication Server (VCS)?
CVE-2020-3596 affects Cisco TelePresence Video Communication Server (VCS) versions up to and including x12.6.3.
How can I fix CVE-2020-3596?
To fix CVE-2020-3596, it is recommended to upgrade to a version of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) that is not affected by the vulnerability.
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