Cisco SD-WAN vEdge Cloud/SD-WAN vEdge Router up to 20.9.3.1 UDP Packet out-of-bounds write

Summaryinfo

A vulnerability marked as critical has been reported in Cisco SD-WAN vEdge Cloud and SD-WAN vEdge Router. This impacts an unknown function of the component UDP Packet Handler. This manipulation causes out-of-bounds write. This vulnerability is registered as CVE-2024-20496. The attack requires access to the local network. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco SD-WAN vEdge Cloud and SD-WAN vEdge Router. It has been declared as critical. Affected by this vulnerability is an unknown code of the component UDP Packet Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in the UDP packet validation code of Cisco SD-WAN vEdge Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to incorrect handling of a specific type of malformed UDP packet. An attacker in a machine-in-the-middle position could exploit this vulnerability by sending crafted UDP packets to an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition on the affected system.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2024-20496 since 11/08/2023. The exploitation appears to be easy. The attack needs to be initiated within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/29/2024).

The vulnerability scanner Nessus provides a plugin with the ID 207742 (Cisco SD-WAN vEdge Software UDP Packet Validation DoS (cisco-sa-sdw-vedos-KqFfhps3)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (207742). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Network Management Software

Vendor

• Cisco

Name

• SD-WAN vEdge Cloud
• SD-WAN vEdge Router

Version

• 18.2.0
• 18.3.0
• 18.3.1
• 18.3.3
• 18.3.4
• 18.3.5
• 18.3.6
• 18.3.7
• 18.3.8
• 18.4.0
• 18.4.1
• 18.4.3
• 18.4.4
• 18.4.5
• 18.4.6
• 18.4.302
• 18.4.303
• 19.0.1a
• 19.1.0
• 19.2.0
• 19.2.097
• 19.2.098
• 19.2.099
• 19.2.1
• 19.2.2
• 19.2.3
• 19.2.4
• 19.2.31
• 19.2.32
• 19.2.929
• 19.3.0
• 20.1.1
• 20.1.2
• 20.1.3
• 20.1.3.1
• 20.1.12
• 20.3.1
• 20.3.2
• 20.3.3
• 20.3.3.2
• 20.3.4
• 20.3.4.3
• 20.3.5
• 20.3.5.1
• 20.3.6
• 20.3.7
• 20.3.7.1
• 20.3.7.2
• 20.3.8
• 20.4.1
• 20.4.1.1
• 20.4.1.2
• 20.4.2
• 20.4.2.3
• 20.5.1
• 20.6.1
• 20.6.1.2
• 20.6.2
• 20.6.3
• 20.6.3.2
• 20.6.3.3
• 20.6.4
• 20.6.4.1
• 20.6.5
• 20.6.5.2
• 20.6.5.3
• 20.6.5.4
• 20.7.1
• 20.7.2
• 20.8.1
• 20.9.1
• 20.9.1.1
• 20.9.2
• 20.9.2.2
• 20.9.2.3
• 20.9.3
• 20.9.3.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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