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CVE-2021-1220

CVE information

Published

3 years ago

Last Modified

1 month ago

CVSSv2.0 Severity

Low

CVSSv3.1 Severity

Medium

Impact Analysis

Description

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..

CVSSv2.0 Score

Severity
Low
Base Score
3.5/10
Exploit Score
6.8/10
Access Vector
Network
Access Complexity
Medium
Authentication Required
Single
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
Partial
Integrity Impact
None

CVSSv3.1 Score

Severity
Medium
Base Score
4.3/10
Exploit Score
2.8/10
Access Vector
Network
Access Complexity
Low
Privileges Required
Low
Impact Score
1.4/10
Confidentiality Impact
None
Availability Impact
Low
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*
  Yes
- -