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CVE-2021-1375

MEDIUMCVSS 6.7/10EPSS 0.23%

Last modified

CVE-2021-1375 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

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.

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
0.23%

13.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe16.5.1
CiscoIos Xe16.5.1a
CiscoIos Xe16.6.1
CiscoIos Xe16.6.2
CiscoIos Xe16.6.3
CiscoIos Xe16.6.4
CiscoIos Xe16.6.4a
CiscoIos Xe16.6.4s
CiscoIos Xe16.6.5
CiscoIos Xe16.6.6
CiscoIos Xe16.6.7
CiscoIos Xe16.8.1
CiscoIos Xe16.8.1a
CiscoIos Xe16.8.1s
CiscoIos Xe16.9.1
CiscoIos Xe16.9.1s
CiscoIos Xe16.9.2
CiscoIos Xe16.9.2s
CiscoIos Xe16.9.3
CiscoIos Xe16.9.3a
CiscoIos Xe16.9.3s
CiscoIos Xe16.9.4
CiscoIos Xe16.10.1
CiscoIos Xe16.10.1e
CiscoIos Xe16.10.1s
CiscoIos Xe16.11.1
CiscoIos Xe16.11.1b
CiscoIos Xe16.11.1c
CiscoIos Xe16.11.1s
CiscoIos Xe16.11.2
CiscoIos Xe16.12.1
CiscoIos Xe16.12.1c
CiscoIos Xe16.12.1s
CiscoIos Xe16.12.2
CiscoIos Xe16.12.2s
CiscoIos Xe16.12.2t
CiscoIos Xe17.1.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1375?
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.
How severe is CVE-2021-1375?
CVE-2021-1375 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1375?
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-2021-1375?

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

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Source: NVD / NIST