Platform
Managed Security Services
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.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
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.
Connect with Us
Platform
Managed Security Services
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.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
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.
Connect with Us
Rewterz Threat Advisory – Microsoft Windows 7 Jet Database Engine Out-Of-Bounds Memory Access Vulnerability
September 25, 2018Rewterz Threat Advisory – CVE-2018-1820 – IBM WebSphere Portal Cross-Site Scripting Vulnerability
September 26, 2018
A vulnerability has been reported in Apache HTTP Server, which can be exploited by malicious people to cause a DoS (Denial of Service).
IMPACT: NORMAL
PUBLISH DATE: 26-09-2018
OVERVIEW
In Apache HTTP Server 2.4.17 to 2.4.34, an attacker could induce a Denial of Service by sending continuous SETTINGS frames of maximum size on an ongoing HTTP/2 connection. It will keep the connection busy and will prevent it from timing out. This can be abused for a DoS on the server. Only servers that have enabled the h2 protocol can be affected.
ANALYSIS
A vulnerability is found in some versions of the Apache HTTP Server that may lead to a Denial of Service condition. This error affects an unknown function of the component SETTINGS Frame Handler.
When handling SETTINGS frames of maximum size an ongoing HTTP/2 connection can be exploited. The connection won’t time out, and may cause Denial of Service. It impacts the availability of an organization.
However, successful exploitation of this error requires that h2 protocol is enabled in the server. This network vulnerability does not require any privileges or user interaction to be exploited.
AFFECTED PRODUCTS
Apache HTTP Server 2.4.x
(The vulnerability is reported in versions 2.4.34, 2.4.33, 2.4.30, 2.4.29, 2.4.28, 2.4.27, 2.4.26, 2.4.25, 2.4.23, 2.4.20, and 2.4.18.)
(The httpd packages in Red Hat Enterprise Linux 7 and earlier do not include support for HTTP/2 and hence are not affected by this issue.)
UPDATES
Update to version 2.4.35. Refer to links for further help.
http://httpd.apache.org/download.cgi
MITIGATION
Apart from updating to the patched version, another possible mitigation is to not enable the h2 protocol.
If you think you are a victim of a cyberattack, immediately send an email to info@rewterz.com.