CVE-2021-1356 Detail
Current 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.
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.
Severity
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-755 | Improper Handling of Exceptional Conditions | NIST |
| CWE-20 | Improper Input Validation | Cisco Systems, Inc. |
Change History
1 change records found show changes
Initial Analysis 3/29/2021 12:19:26 PM
| Action | Type | Old Value | New Value |
|---|---|---|---|
| Added | CPE Configuration | Record truncated, showing 500 of 664 characters. View Entire Change Record OR
*cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:ios_xe:17.2.1r:
|
|
| Added | CVSS V2 |
NIST (AV:N/AC:M/Au:S/C:N/I:N/A:P) |
|
| Added | CVSS V3.1 |
NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
|
| Added | CWE |
NIST CWE-755 |
|
| Changed | Reference Type |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn No Types Assigned |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn Vendor Advisory |
Quick Info
CVE Dictionary Entry:
CVE-2021-1356
NVD Published Date:
03/24/2021
NVD Last Modified:
03/29/2021
Source:
Cisco Systems, Inc.