What is CVE-2023-20051?

CVE-2023-20051 is a vulnerability in the Vector Packet Processor (VPP) of Cisco Packet Data Network Gateway (PGW) that could allow an unauthenticated, remote attacker to stop ICMP traffic from being processed over an IPsec connection.

What is the severity of CVE-2023-20051?

The severity of CVE-2023-20051 is high, with a severity value of 7.5.

Which software is affected by CVE-2023-20051?

The Cisco Packet Data Network Gateway (PGW) version up to 21.28.0 is affected by CVE-2023-20051.

What is the Cisco ASR 5000?

The Cisco ASR 5000 is a network router that is not vulnerable to CVE-2023-20051.

What is the Cisco ASR 5500?

The Cisco ASR 5500 is a network router that is not vulnerable to CVE-2023-20051.

Vulnerability/
CVE-2023-20051

high

7.5

CWE

400

5/4/2023

28/10/2024

CVE-2023-20051: Cisco Packet Data Network Gateway IPsec ICMP Denial of Service Vulnerability

First published: Wed Apr 05 2023(Updated: )

A vulnerability in the Vector Packet Processor (VPP) of Cisco Packet Data Network Gateway (PGW) could allow an unauthenticated, remote attacker to stop ICMP traffic from being processed over an IPsec connection. This vulnerability is due to the VPP improperly handling a malformed packet. An attacker could exploit this vulnerability by sending a malformed Encapsulating Security Payload (ESP) packet over an IPsec connection. A successful exploit could allow the attacker to stop ICMP traffic over an IPsec connection and cause a denial of service (DoS).

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Packet Data Network Gateway	<21.28.0
Cisco ASR 5000
Cisco ASR 5500
Cisco Asr 5700

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Reference Links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-pdng-dos-KmzwEy2Q

Frequently Asked Questions

What is CVE-2023-20051?
CVE-2023-20051 is a vulnerability in the Vector Packet Processor (VPP) of Cisco Packet Data Network Gateway (PGW) that could allow an unauthenticated, remote attacker to stop ICMP traffic from being processed over an IPsec connection.
What is the severity of CVE-2023-20051?
The severity of CVE-2023-20051 is high, with a severity value of 7.5.
Which software is affected by CVE-2023-20051?
The Cisco Packet Data Network Gateway (PGW) version up to 21.28.0 is affected by CVE-2023-20051.
What is the Cisco ASR 5000?
The Cisco ASR 5000 is a network router that is not vulnerable to CVE-2023-20051.
What is the Cisco ASR 5500?
The Cisco ASR 5500 is a network router that is not vulnerable to CVE-2023-20051.

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