Vulnerability · Published Oct 8, 2020 · Assigned by cisco

CVE-2020-3596Cisco Expressway Series and TelePresence Video Communication Server Denial of Service Vulnerability

Medium 5.9

In plain English

A medium-severity security flaw in Cisco TelePresence Video Communication Server (VCS) Expressway from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)1.2%top 31.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco TelePresence Video Communication Server (VCS) Expressway	n/a

Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

20201007 Cisco Expressway Series and TelePresence Video Communication Server Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO