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    Rewterz Threat Advisory – CVE-2018-1336 and CVE-2018-8037 Apache Releases Security Updates for Apache Tomcat

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    March 22, 2023
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    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
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    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
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    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

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    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.

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    Rewterz Threat Advisory – CVE-2018-1336 and CVE-2018-8037 Apache Releases Security Updates for Apache Tomcat

    Managed Security Services

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

    Managed Penetration Testing

    Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.

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    March 22, 2023
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    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

    Threat Insights

    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

    Our Leadership

    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

    CSR

    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
Rewterz Threat Advisory – Emotet, A Banking Trojan Responsible For Network-Wide Infection
July 20, 2018
Rewterz
Rewterz Threat Intelligence Report 2018
August 3, 2018

Rewterz Threat Advisory – CVE-2018-1336 and CVE-2018-8037 Apache Releases Security Updates for Apache Tomcat

July 23, 2018

This is an advisory on security updates released by The Apache Software Foundation to address vulnerabilities in Apache Tomcat.

 

IMPACT:  CRITICAL

PUBLISH DATE:  23-07-2018

 

OVERVIEW

The Apache Software Foundation has recently released updates to patch the vulnerabilities found in some versions of the Apache Tomcat. These vulnerabilities can be exploited to obtain sensitive information.

 

BACKGROUND INFORMATION

The Apache Software Foundation has discovered two vulnerabilities in the Apache Tomcat software. CVE-2018-1336 Apache Tomcat – Denial of Service vulnerability, and CVE-2018-8037 Apache Tomcat – Information Disclosure vulnerability, were found on July 22nd, that have been patched by the Apache Software Foundation the following day.

 

The addressed vulnerabilities were found in the Apache Tomcat versions 9.0.0.M9 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.

 

WORK FLOW ANALYSIS

CVE-2018-1336 is an Apache Tomcat Denial of Service vulnerability. Tomcat uses the UTF-8 decoder of the late Apache Harmony project, that decoder has a not supported edge case (aka Bug), which can lead to an infinite loop while trying to decode UTF-8 encoded characters, when an overflow in the UTF-8 décor is mishandled. Thus, the infinite loop leads to Denial of Service (DoS).

 

CVE-2018-8037 is an Apache Tomcat Information Disclosure vulnerability. It occurs due to a bug in the tracking of connection closures, that can lead to reuse of user sessions in a new connection. It seems that the researchers are not yet entirely clear on what factor triggered this potentially grave vulnerability of mixed up user sessions in the NIO and NIO2 connectors. According to the reporter it was accompanied by several exceptions happening in the same time frame.

 

AVAILABLE UPDATES

 

Updates for CVE-2018-8037:

 

Affected version Upgrade to
Apache Tomcat 9.0.0.M9 to 9.0.9Apache Tomcat 9.0.10 or later.
Apache Tomcat 8.5.5 to 8.5.31Apache Tomcat 8.5.32 or later.

 

 

Updates for CVE-2018-1336:

 

Affected version Upgrade to
Apache Tomcat 9.0.0.M9 to 9.0.7Apache Tomcat 9.0.7 or later
Apache Tomcat 8.5.0 to 8.5.30Apache Tomcat 8.5.32 or later
Apache Tomcat 8.0.0.RC1 to 8.0.51Apache Tomcat 8.0.52 or later
Apache Tomcat 7.0.28 to 7.0.86Apache Tomcat 7.0.90 or later

 

RESOLVE 

To stay safe from known vulnerabilities, we advise you to update your Tomcat installations each time a new Tomcat patch release is announced.

                       

 

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

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Managed Security Services

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Assess

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Transform

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  • SIEM Gap Analysis
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