Vulnerability Monitor

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CVE-2021-1356

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.

Published

2021-03-24T21:15:11.647

Last Modified

2024-11-21T05:44:10.107

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: SINGLE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

6.8

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-20
  • Type: Primary
    CWE-755
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe 3.15.1xbs Yes
Operating System cisco ios_xe 3.15.2xbs Yes
Operating System cisco ios_xe 17.1.1 Yes
Operating System cisco ios_xe 17.1.1a Yes
Operating System cisco ios_xe 17.1.1s Yes
Operating System cisco ios_xe 17.1.1t Yes
Operating System cisco ios_xe 17.1.2 Yes
Operating System cisco ios_xe 17.2.1 Yes
Operating System cisco ios_xe 17.2.1a Yes
Operating System cisco ios_xe 17.2.1r Yes
Operating System cisco ios_xe 17.2.1v Yes
Operating System cisco ios_xe 17.2.2 Yes
Operating System cisco ios_xe 17.2.3 Yes
References