Vulnerability · Published Jun 3, 2020 · Assigned by cisco

CVE-2020-3226Cisco IOS and IOS XE Software Session Initiation Protocol Denial of Service Vulnerability

High 8.6

In plain English

A high-severity improper input validation in Cisco IOS 15.0(2)SG11a from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities).

Severity (CVSS 3.0)8.6High

Exploit odds (30 days)1.6%top 24.7% 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) library of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient sanity checks on received SIP messages. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service condition.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS 15.0(2)SG11a	n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References

20200603 Cisco IOS and IOS XE Software Session Initiation Protocol Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO