CVE-2023-20049

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A vulnerability in the bidirectional forwarding detection (BFD) hardware offload feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed BFD packets that are received on line cards where the BFD hardware offload feature is enabled. An attacker could exploit this vulnerability by sending a crafted IPv4 BFD packet to an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset, resulting in loss of traffic over that line card while the line card reloads.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-805CWE-119

Affected software

No affected versions have been published.

Timeline

Published
Mar 9, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2023

CVE-2023-20058.8Vulnerability in Tenable Tenable.Io, Tenable Nessus, Tenable Security Center.This issue affects Tenable.Io: before Plugin Feed ID #202306261CVE-2023-200507.8A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlyCVE-2023-200517.5A vulnerability in the Vector Packet Processor (VPP) of Cisco Packet Data Network Gateway (PGW) could allow an unauthenticated, remote attacCVE-2023-200525.3On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed: A vulnerability in the DMG file parser of ClCVE-2023-200536.1A vulnerability in the web-based management interface of Cisco Nexus Dashboard could allow an unauthenticated, remote attacker to conduct a CVE-2023-200558.8A vulnerability in the management API of Cisco DNA Center could allow an authenticated, remote attacker to elevate privileges in the contextCVE-2023-200565.5A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of CVE-2023-200575.3A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticCVE-2023-200586.1A vulnerability in the web-based management interface of Cisco Unified Intelligence Center could allow an unauthenticated, remote attacker tCVE-2023-200596.5A vulnerability in the implementation of the Cisco Network Plug-and-Play (PnP) agent of Cisco DNA Center could allow an authenticated, remotCVE-2023-20067.0A race condition was found in the Linux kernel's RxRPC network protocol, within the processing of RxRPC bundles. This issue results from theCVE-2023-200606.1A vulnerability in the web-based management interface of Cisco Prime Collaboration Deployment could allow an unauthenticated, remote attacke
CVE-2023-20049: High severity, CVSS 7.5 | Vulnix