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CVE-2021-1441

MEDIUMCVSS 6.7/10EPSS 0.31%

Last modified

CVE-2021-1441 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A vulnerability in the hardware initialization routines of Cisco IOS XE Software for Cisco 1100 Series Industrial Integrated Services Routers and Cisco ESR6300 Embedded Series Routers could allow an authenticated, local attacker to execute unsigned code at system boot time. This vulnerability is due to incorrect validations of parameters passed to a diagnostic script that is executed when the device boots up. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

A vulnerability in the hardware initialization routines of Cisco IOS XE Software for Cisco 1100 Series Industrial Integrated Services Routers and Cisco ESR6300 Embedded Series Routers could allow an authenticated, local attacker to execute unsigned code at system boot time. This vulnerability is due to incorrect validations of parameters passed to a diagnostic script that is executed when the device boots up. An attacker could exploit this vulnerability by tampering with an executable file stored on a device. A successful exploit could allow the attacker to execute unsigned code at boot time and bypass the software image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need administrative level credentials (level 15) on the device.

Metrics

CVSS 3.1
6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.31%

22.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe3.15.1xbs
CiscoIos Xe3.15.2xbs
CiscoIos Xe16.9.1
CiscoIos Xe16.9.1c
CiscoIos Xe16.10.1
CiscoIos Xe16.10.1e
CiscoIos Xe16.11.1
CiscoIos Xe16.11.1c
CiscoIos Xe16.11.1s
CiscoIos Xe16.12.1
CiscoIos Xe16.12.1c
CiscoIos Xe16.12.1s
CiscoIos Xe16.12.1za
CiscoIos Xe16.12.2
CiscoIos Xe16.12.2s
CiscoIos Xe16.12.2t
CiscoIos Xe16.12.3
CiscoIos Xe16.12.3s
CiscoIos Xe16.12.4
CiscoIos Xe17.1.1
CiscoIos Xe17.1.1s
CiscoIos Xe17.1.1t
CiscoIos Xe17.1.2
CiscoIos Xe17.2.1
CiscoIos Xe17.2.1r
CiscoIos Xe17.2.1v
CiscoIos Xe17.2.3

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1441?
A vulnerability in the hardware initialization routines of Cisco IOS XE Software for Cisco 1100 Series Industrial Integrated Services Routers and Cisco ESR6300 Embedded Series Routers could allow an authenticated, local attacker to execute unsigned code at system boot time. This vulnerability is due to incorrect validations of parameters passed to a diagnostic script that is executed when the device boots up. An attacker could exploit this vulnerability by tampering with an executable file stored on a device. A successful exploit could allow the attacker to execute unsigned code at boot time and bypass the software image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need administrative level credentials (level 15) on the device.
How severe is CVE-2021-1441?
CVE-2021-1441 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1441?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-1441?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST