#VU51707 Insufficient verification of data authenticity in Cisco Systems, Inc products - CVE-2021-1403

Vulnerability identifier: #VU51707

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-1403

CWE-ID: CWE-345

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Cisco ASR 1000 Series Aggregation Services Routers
Cloud Services Router 1000V Series
Cisco 2600 Series Multiservice Platforms
Cisco Catalyst 3850 Series Switches
Cisco Catalyst 3650 Series Switches
Cisco 4000 Series Integrated Services Routers
Cisco 1000 Series Integrated Services Routers
Cisco Catalyst 9300 Series Switches
Cisco Catalyst 9500 Series Switches
Cisco Catalyst 9400 Series Switches
Cisco 1100 Series Industrial Integrated Services Routers
Cisco Catalyst 9200 Series Switches
Cisco Embedded Services 3300 Series Switches
Cisco Catalyst IE3200 Rugged Series
Cisco Catalyst IE3300 Rugged Series
Cisco Catalyst IE3400 Rugged Series
Cisco Catalyst 9600 Series Switches
Cisco Catalyst 9800 Series Wireless Controllers
Cisco Catalyst IE3400 Heavy Duty Series
Cisco Cloud Services Router 1000V Series
Cisco IOS XE

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists in the web UI feature of Cisco IOS XE Software. A remote attacker can conduct a cross-site WebSocket hijacking (CSWSH) attack and cause denial of service.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-cswsh-FKk9AzT5
• https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu98441