CVE-2021-1220

CVSS V2 Low 3.5 CVSS V3 Medium 4.3
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.
Overview
  • CVE ID
  • CVE-2021-1220
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-03-24T21:15:11
  • Last Modified Date
  • 2021-03-29T18:17:31
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.1z:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 3.5
  • Severity
  • LOW
  • Exploitability Score
  • 6.8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • LOW
  • Base Score
  • 4.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 1.4
History
Created Old Value New Value Data Type Notes
2022-05-10 07:18:18 Added to TrackCVE
2022-12-06 00:22:06 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-06 00:22:06 2021-03-24T21:15Z 2021-03-24T21:15:11 CVE Published Date updated
2022-12-06 00:22:06 2021-03-29T18:17:31 CVE Modified Date updated
2022-12-06 00:22:06 Analyzed Vulnerability Status updated