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    Rewterz Threat Advisory – CVE-2018-15443 – Cisco Firepower Detection Engine TCP Intrusion Prevention System Rule Bypass Vulnerability

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    Rewterz Threat Advisory – CVE-2022-42436 – IBM MQ Vulnerability
    Severity Medium Analysis Summary CVE-2022-42436 IBM MQ Managed File Transfer could allow a local user to obtain sensitive information from diagnostic files. Impact Indicators Of Compromise […]
    March 19, 2023
    March 19, 2023
    Rewterz Threat Advisory – ICS: Rockwell Automation Modbus TCP AOI Server Vulnerability
    Severity Medium Analysis Summary CVE-2023-0027 Rockwell Automation Modbus TCP AOI Server could allow a remote attacker to obtain sensitive information. By sending a malformed message, an […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Advisory – ICS: Multiple Schneider Electric IGSS Vulnerabilities
    Severity High Analysis Summary CVE-2023-27984 CVSS:7.8 Schneider Electric IGSS could allow a remote attacker to execute arbitrary code on the system, caused by improper input validation […]

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    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

    Read More

    play_btn_Smallplay_btn_hover_Small
    leadership

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    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
    help

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    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

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Rewterz Threat Advisory – CVE-2018-15443 – Cisco Firepower Detection Engine TCP Intrusion Prevention System Rule Bypass Vulnerability

November 9, 2018

Cisco’s TCP intrusion prevention system can be bypassed due to a vulnerability in firepower detection engine.

 

 

IMPACT:  MEDIUM

 

 

PUBLISH DATE:  09-11-2018

 

 

OVERVIEW

 

 

Due to incorrect TCP retransmission handling, an attacker can bypass some rules of Cisco Fire Power’s Intrusion Prevention System. No patches are available for this vulnerability.

 

 

Analysis

 

 

The detection engine of Cisco Firepower System Software contains a vulnerability which could allow an unauthenticated, remote attacker to bypass some of the configured rules of its Intrusion Prevention System (IPS). The system is designed to inspect certain types of TCP traffic. Once affected, the traffic inspection fails to detect certain malicious traffic and may let an attacker enter the network. The vulnerability exists due to incorrect TCP retransmission handling.

 

 

In order to exploit this vulnerability, an attacker can send a crafted TCP connection request through an affected device. If successful, the exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.

 

 

Affected Products

 

 

This vulnerability affects Cisco Firepower System Software releases before the first fixed release where the device is configured with an IPS rule for TCP traffic inspection.

 

 

RESOLVE

 

 

There are no workarounds available for fixing this vulnerability yet.

 

 

If you think you are a victim of a cyber-security attack. Immediately send an email to soc@rewterz.com for a rapid response.

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  • Rewterz XDR
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Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
  • Hybrid SOC

Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
  • Architecture Design & Review
  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
  • Source Code Review

Transform

  • SOC Consultancy
  • SOC Maturity Assessment
  • SOC Model Evaluation
  • SOC Gap Analysis
  • SIEM Gap Analysis
  • SIEM Optimization
  • SOC Content Pack

Train

  • Simulated Cyber Attack Exercise
  • Tabletop Exercise
  • Security Awareness and Training

Respond

  • Incident Analysis
  • Incident Response

Threat Insights

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  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

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Connect With Us

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