7.4
High
CVE-2020-3511 A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated,…
Description
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS | Versions not published |
Other CVEs of Cisco IOS
The 36 CVEs of Cisco IOS →
CVE-2023-20080
A vulnerability in the IPv6 DHCP version 6 (DHCPv6) relay and server features of Cisco IOS and IOS XE Software could…
8.6
High
CVE-2023-20081
A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, Cisco…
6.8
Medium
CVE-2023-20076
A vulnerability in the Cisco IOx application hosting environment could allow an authenticated, remote attacker to…
7.2
High
CVE-2022-20920
A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an…
7.7
High