Cisco IOS XR 9000 Bidirectional Forwarding Detection denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS XR 9000. Impacted is an unknown function of the component Bidirectional Forwarding Detection. This manipulation causes denial of service. This vulnerability is handled as CVE-2023-20049. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco IOS XR 9000 (Router Operating System) and classified as critical. Affected by this vulnerability is an unknown functionality of the component Bidirectional Forwarding Detection. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was released 03/08/2023 as cisco-sa-bfd-XmRescbT. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2023-20049 since 10/27/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24228). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
03/08/2023 +132 days 🔍
03/08/2023 +0 days 🔍
08/17/2025 +893 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-bfd-XmRescbT
Status: Confirmed

CVE: CVE-2023-20049 (🔍)
GCVE (CVE): GCVE-0-2023-20049
GCVE (VulDB): GCVE-100-222601
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 03/08/2023 19:19
Updated: 08/17/2025 11:00
Changes: 03/08/2023 19:19 (40), 04/01/2023 20:09 (1), 04/01/2023 20:17 (21), 08/17/2025 11:00 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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