Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU51707
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-1403
CWE-ID:
CWE-345 - Insufficient Verification of Data Authenticity
Exploit availability: No
DescriptionThe 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.
Vulnerable software versionsCisco ASR 1000 Series Aggregation Services Routers: All versions
Cloud Services Router 1000V Series: All versions
Cisco 2600 Series Multiservice Platforms: All versions
Cisco Catalyst 3850 Series Switches: All versions
Cisco Catalyst 3650 Series Switches: All versions
Cisco 4000 Series Integrated Services Routers: All versions
Cisco 1000 Series Integrated Services Routers: All versions
Cisco Catalyst 9300 Series Switches: All versions
Cisco Catalyst 9500 Series Switches: All versions
Cisco Catalyst 9400 Series Switches: All versions
Cisco 1100 Series Industrial Integrated Services Routers: All versions
Cisco Catalyst 9200 Series Switches: All versions
Cisco Embedded Services 3300 Series Switches: All versions
Cisco Catalyst IE3200 Rugged Series: All versions
Cisco Catalyst IE3300 Rugged Series: All versions
Cisco Catalyst IE3400 Rugged Series: All versions
Cisco Catalyst 9600 Series Switches: All versions
Cisco Catalyst 9800 Series Wireless Controllers: All versions
Cisco Catalyst IE3400 Heavy Duty Series: All versions
Cisco Cloud Services Router 1000V Series: All versions
Cisco IOS XE: 17.2.1
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-cswsh-FKk9AzT5
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu98441
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.