cisco-sa-iosxe-buffover-CqdRWLc: Cisco IOS XE SD-WAN Software vDaemon Buffer Overflow Vulnerability
First published: Wed Mar 24 2021(Updated: )
A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when the device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. The attacker must have a man-in-the-middle position between Cisco vManage and an associated device that is running an affected version of Cisco IOS XE SD-WAN Software. An exploit could allow the attacker to conduct a controllable buffer overflow attack (and possibly execute arbitrary commands as the root user) or cause a device reload, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-buffover-CqdRWLc 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: This vulnerability was found by James Spadaro III Cisco during internal security testing
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Standalone IOS XE SD-WAN Releases |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-iosxe-buffover-CqdRWLc?
The severity of cisco-sa-iosxe-buffover-CqdRWLc is classified as high due to the potential for remote unauthenticated attackers to exploit the buffer overflow.
How do I fix cisco-sa-iosxe-buffover-CqdRWLc?
To fix cisco-sa-iosxe-buffover-CqdRWLc, update your Cisco IOS XE SD-WAN Software to the latest patched version provided by Cisco.
What systems are affected by cisco-sa-iosxe-buffover-CqdRWLc?
cisco-sa-iosxe-buffover-CqdRWLc affects devices running Cisco IOS XE SD-WAN Software that are processing network traffic.
What are the potential impacts of cisco-sa-iosxe-buffover-CqdRWLc?
The potential impacts of cisco-sa-iosxe-buffover-CqdRWLc include device crashes, unauthorized access, and service disruption.
Is authentication required to exploit cisco-sa-iosxe-buffover-CqdRWLc?
No, authentication is not required to exploit cisco-sa-iosxe-buffover-CqdRWLc, making it particularly critical.
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