CVE Vulnerability

CVE-2021-1220

Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.

3.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

4.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn Vendor Advisory
Configurations

Configuration 1

cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*
Information

Published : 2021-03-24 09:15

Updated : 2021-03-29 06:17

NVD link : CVE-2021-1220

Mitre link : CVE-2021-1220

Products Affected
No products.
CWE
CWE-20