Vulnerability Monitor

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CVE-2021-1376

Multiple vulnerabilities in the fast reload feature of Cisco IOS XE Software running on Cisco Catalyst 3850, Cisco Catalyst 9300, and Cisco Catalyst 9300L Series Switches could allow an authenticated, local attacker to either execute arbitrary code on the underlying operating system, install and boot a malicious software image, or execute unsigned binaries on an affected device. These vulnerabilities are due to improper checks performed by system boot routines. To exploit these vulnerabilities, the attacker would need privileged access to the CLI of the device. A successful exploit could allow the attacker to either execute arbitrary code on the underlying operating system or execute unsigned code and bypass the image verification check part of the secure boot process. For more information about these vulnerabilities, see the Details section of this advisory.

Published

2021-03-24T21:15:12.177

Last Modified

2024-11-21T05:44:12.747

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.7 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.9

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-347
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe 16.5.1 Yes
Operating System cisco ios_xe 16.5.1a Yes
Operating System cisco ios_xe 16.6.1 Yes
Operating System cisco ios_xe 16.6.2 Yes
Operating System cisco ios_xe 16.6.3 Yes
Operating System cisco ios_xe 16.6.4 Yes
Operating System cisco ios_xe 16.6.4a Yes
Operating System cisco ios_xe 16.6.4s Yes
Operating System cisco ios_xe 16.6.5 Yes
Operating System cisco ios_xe 16.6.6 Yes
Operating System cisco ios_xe 16.6.7 Yes
Operating System cisco ios_xe 16.6.8 Yes
Operating System cisco ios_xe 16.8.1 Yes
Operating System cisco ios_xe 16.8.1a Yes
Operating System cisco ios_xe 16.8.1s Yes
Operating System cisco ios_xe 16.9.1 Yes
Operating System cisco ios_xe 16.9.1s Yes
Operating System cisco ios_xe 16.9.2 Yes
Operating System cisco ios_xe 16.9.2s Yes
Operating System cisco ios_xe 16.9.3 Yes
Operating System cisco ios_xe 16.9.3a Yes
Operating System cisco ios_xe 16.9.3s Yes
Operating System cisco ios_xe 16.9.4 Yes
Operating System cisco ios_xe 16.9.5 Yes
Operating System cisco ios_xe 16.9.6 Yes
Operating System cisco ios_xe 16.10.1 Yes
Operating System cisco ios_xe 16.10.1e Yes
Operating System cisco ios_xe 16.10.1s Yes
Operating System cisco ios_xe 16.11.1 Yes
Operating System cisco ios_xe 16.11.1b Yes
Operating System cisco ios_xe 16.11.1c Yes
Operating System cisco ios_xe 16.11.1s Yes
Operating System cisco ios_xe 16.11.2 Yes
Operating System cisco ios_xe 16.12.1 Yes
Operating System cisco ios_xe 16.12.1c Yes
Operating System cisco ios_xe 16.12.1s Yes
Operating System cisco ios_xe 16.12.2 Yes
Operating System cisco ios_xe 16.12.2s Yes
Operating System cisco ios_xe 16.12.2t Yes
Operating System cisco ios_xe 16.12.3 Yes
Operating System cisco ios_xe 16.12.3a Yes
Operating System cisco ios_xe 16.12.3s Yes
Operating System cisco ios_xe 16.12.4 Yes
Operating System cisco ios_xe 16.12.4a Yes
Operating System cisco ios_xe 17.1.1 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
References