cisco-sa-fast-Zqr6DD5: Cisco IOS XE Software Fast Reload Vulnerabilities
First published: Wed Mar 24 2021(Updated: )
Multiple vulnerabilities in the fast reload feature of Cisco IOS XE Software running on Cisco Catalyst 3650, 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. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fast-Zqr6DD5 This advisory is part of the March 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.
Credit: These vulnerabilities were found by Victor Kamensky CiscoX.B. Cisco Advanced Initiatives Group
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | ||
| Cisco Catalyst 3650-24TD-E | ||
| Cisco Catalyst 3850 Series | ||
| Cisco Catalyst C9300-24P | ||
| Cisco Catalyst 9300l Firmware |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-fast-Zqr6DD5?
The severity of cisco-sa-fast-Zqr6DD5 is critical due to the potential for arbitrary code execution.
How do I fix cisco-sa-fast-Zqr6DD5?
To fix cisco-sa-fast-Zqr6DD5, apply the appropriate software updates and patches provided by Cisco.
Which devices are affected by cisco-sa-fast-Zqr6DD5?
cisco-sa-fast-Zqr6DD5 affects Cisco Catalyst 3650, 3850, 9300, and 9300L Series Switches running IOS XE Software.
Can cisco-sa-fast-Zqr6DD5 be exploited remotely?
No, cisco-sa-fast-Zqr6DD5 requires an authenticated, local attacker to exploit the vulnerability.
What features of Cisco IOS XE Software are impacted by cisco-sa-fast-Zqr6DD5?
The fast reload feature of Cisco IOS XE Software is impacted by cisco-sa-fast-Zqr6DD5.
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