CVE Vulnerabilities

CVE-2021-1356

Improper Handling of Exceptional Conditions

Published: Mar 24, 2021 | Modified: Mar 29, 2021
CVSS 3.x
4.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.x
3.5 LOW
AV:N/AC:M/Au:S/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

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.

Weakness

The software does not handle or incorrectly handles an exceptional condition.

Affected Software

Name Vendor Start Version End Version
Ios_xe Cisco 3.15.1xbs 3.15.1xbs
Ios_xe Cisco 3.15.2xbs 3.15.2xbs
Ios_xe Cisco 17.1.1 17.1.1
Ios_xe Cisco 17.1.1a 17.1.1a
Ios_xe Cisco 17.1.1s 17.1.1s
Ios_xe Cisco 17.1.1t 17.1.1t
Ios_xe Cisco 17.1.2 17.1.2
Ios_xe Cisco 17.2.1 17.2.1
Ios_xe Cisco 17.2.1a 17.2.1a
Ios_xe Cisco 17.2.1r 17.2.1r
Ios_xe Cisco 17.2.1v 17.2.1v
Ios_xe Cisco 17.2.2 17.2.2
Ios_xe Cisco 17.2.3 17.2.3

References