Wednesday, April 16, 2025
HomeCiscoCisco Patched Products Vulnerable to HTTP/2 Rapid Reset Attack

Cisco Patched Products Vulnerable to HTTP/2 Rapid Reset Attack

Published on

SIEM as a Service

Follow Us on Google News

A new high-severity vulnerability has been discovered in multiple Cisco products, which could potentially allow HTTP/2 Rapid Reset Attack.

This vulnerability enables a novel distributed denial of service (DDoS) attack technique.

This vulnerability was assigned with CVE-2023-44487 and a severity rating of 7.5 (High).

- Advertisement - Google News

In addition, this vulnerability has been known to be actively exploited by threat actors in the wild. 

CVE-2023-44487: HTTP/2 Rapid Reset

A threat actor could exploit this vulnerability by using the HTTP/2 protocol-level weakness, resulting in a Distributed Denial of Service condition on vulnerable Cisco devices.

The HTTP/2 rapid reset is a layer 7 attack that leverages the high efficiency of the HTTP/2 protocol feature, diverting them into a DDoS attack

A threat actor can make the client open multiple concurrent streams on a single TCP connection, each corresponding to one HTTP request.

Document
Free Webinar

Live API Attack Simulation Webinar

In the upcoming webinar, Karthik Krishnamoorthy, CTO and Vivek Gopalan, VP of Products at Indusface demonstrate how APIs could be hacked. The session will cover: an exploit of OWASP API Top 10 vulnerability, a brute force account take-over (ATO) attack on API, a DDoS attack on an API, how a WAAP could bolster security over an API gateway

Affected Products

Network and Content Security Devices

ProductFixed Release Availability
Secure Dynamic Attribute Connector (CSDAC)2.2 (Nov 2023)2.3 (Nov 2023)
Secure Malware Analytics Appliance, formerly Threat Grid Appliance2.19.2 (Dec 2023)
Secure Web Appliance, formerly Web Security Appliance (WSA)
Network Management and Provisioning
Business Process Automation3.2.003.009 (Nov 2023)4.0.001.003 (Nov 2023)4.0.002.003 (Nov 2023)
Crosswork Data Gateway4.1.3 (Dec 2023)5.0.2 (Dec 2023)6.0 (Dec 2023)
Crosswork Situation ManagerContact Cisco TAC for upgrade options
Crosswork Zero Touch Provisioning (ZTP)6.0.0 (Dec 2023)
Data Center Network Manager (DCNM) – SAN Deployments on Windows or LinuxApply Workaround
IoT Field Network Director, formerly Connected Grid Network Management System4.11.0 (Dec 2023)
Prime Access Registrar9.3.3 (Feb 2024)
Prime Cable Provisioning7.2.1 (Nov 2023)
Prime Infrastructure3.10.4 (Dec 2023)
Prime Network Registrar11.2 (Available)
Routing and Switching – Enterprise and Service Provider
IOS XE Software
IOS XR Software
IOx Fog Director1.22 (Nov 2023)
Nexus 3000 Series Switches
Nexus 9000 Series Switches in standalone NX-OS mode
Ultra Cloud Core – Access and Mobility Management Function2024.02.0 (May 2024)
Ultra Cloud Core – Policy Control Function2024.01.0 (Feb 2024)
Ultra Cloud Core – Session Management Function
Voice and Unified Communications Devices
Enterprise Chat and EmailApply Microsoft Windows Update or Workaround
Unified Attendant Console AdvancedApply Microsoft Windows Update or Workaround
Unified Contact Center Domain Manager (CCDM)Apply Microsoft Windows Update or Workaround
Unified Contact Center Enterprise (UCCE)Apply Microsoft Windows Update or Workaround
Unified Contact Center Enterprise – Live Data server12.6.2 (Nov 2023)
Unified Contact Center Express (UCCX)
Unified Contact Center Management Portal (CCMP)Apply Microsoft Windows Update or Workaround
Video, Streaming, TelePresence, and Transcoding Devices
Expressway SeriesX14.3.3 (Dec 2023)
TelePresence Video Communication Server (VCS)X14.3.3 (Dec 2023)
Wireless
Connected Mobile Experiences11.1 (Feb 2024)

Cisco has released security patches to fix this vulnerability on all of its affected versions and has urged its users to upgrade them appropriately to prevent them from getting exploited by threat actors.

Experience how StorageGuard eliminates the security blind spots in your storage systems by trying a 14-day free trial.

Balaji
Balaji
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Latest articles

Critical Chrome Vulnerability Exposes Users to Data Theft and Unauthorized Access

A critical security vulnerability has been discovered in Google Chrome, prompting an urgent update...

Authorities Shut Down Four Encrypted Platforms Used by Cybercriminals

Law enforcement authorities across Europe and Türkiye have dealt a major blow to four...

Microsoft Teams File Sharing Unavailable Due to Unexpected Outage

Microsoft Teams users across the globe are experiencing significant disruptions in file-sharing capabilities due...

Cloud Misconfigurations – A Leading Cause of Data Breaches

Cloud computing has transformed the way organizations operate, offering unprecedented scalability, flexibility, and cost...

Resilience at Scale

Why Application Security is Non-Negotiable

The resilience of your digital infrastructure directly impacts your ability to scale. And yet, application security remains a critical weak link for most organizations.

Application Security is no longer just a defensive play—it’s the cornerstone of cyber resilience and sustainable growth. In this webinar, Karthik Krishnamoorthy (CTO of Indusface) and Phani Deepak Akella (VP of Marketing – Indusface), will share how AI-powered application security can help organizations build resilience by

Discussion points


Protecting at internet scale using AI and behavioral-based DDoS & bot mitigation.
Autonomously discovering external assets and remediating vulnerabilities within 72 hours, enabling secure, confident scaling.
Ensuring 100% application availability through platforms architected for failure resilience.
Eliminating silos with real-time correlation between attack surface and active threats for rapid, accurate mitigation

More like this

Critical Chrome Vulnerability Exposes Users to Data Theft and Unauthorized Access

A critical security vulnerability has been discovered in Google Chrome, prompting an urgent update...

Authorities Shut Down Four Encrypted Platforms Used by Cybercriminals

Law enforcement authorities across Europe and Türkiye have dealt a major blow to four...

Microsoft Teams File Sharing Unavailable Due to Unexpected Outage

Microsoft Teams users across the globe are experiencing significant disruptions in file-sharing capabilities due...