Security Bulletin: IBM QRadar SIEM protocols are affected by denial of service.

Summary gRPC is affected by denial of service and connection termination issues due to flaws in request parsing and protocol handling. These issues may result in excessive resource consumption or unexpected disruptions in service availability. Vulnerability Details CVEID:CVE-2023-33953 DESCRIPTIO...

Denial Of Service (DoS)

org.apache.tomcat:tomcat-coyote is vulnerable to Denial Of Service DoS. The vulnerability is due to failure to handle cases where an HTTP/2 client does not acknowledge the initial settings frame, allowing excessive concurrent streams and leading to resource exhaustion...

CVE-2025-49630

An assertion failure flaw was found in Apache httpd. Untrusted clients can send inputs that trigger an assertion failure in the modproxyhttp2 module, which likely results in an Apache HTTP server crash or denial of service DoS. Mitigation No mitigation is currently available that meets Red Hat...

Race Condition Vulnerability

org.apache.tomcat, tomcat-util is vulnerable to Race Condition Vulnerability. The vulnerability is due to improper synchronization in the APR/Native connector when handling client-initiated HTTP/2 connection closures, which allows an attacker to exploit race conditions potentially leading to...

FreeBSD : Apache Tomcat -- Multiple Vulnerabilities (ef87346f-5dd0-11f0-beb2-ac5afc632ba3)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ef87346f-5dd0-11f0-beb2-ac5afc632ba3 advisory. [email protected] reports: A race condition on connection close could trigger a JVM crash wh...

Apache Tomcat Coyote vulnerable to Denial of Service via excessive HTTP/2 streams

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1...

Apache Tomcat is vulnerable to resource exhaustion when using the APR/Native connector

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 throug...

CVE-2025-53506

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1...

CVE-2025-52434

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 throug...

CVE-2025-53506 Apache Tomcat: DoS via excessive h2 streams at connection start

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1...

CVE-2025-53506 Apache Tomcat: DoS via excessive h2 streams at connection start

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1...

CVE-2025-53506 Apache Tomcat: DoS via excessive h2 streams at connection start

Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1...

CVE-2025-53506

CVE-2025-53506 is an Uncontrolled Resource Consumption vulnerability in Apache Tomcat's HTTP/2 handling: if an HTTP/2 client does not acknowledge the initial settings frame, Tomcat may reduce the maximum permitted concurrent streams, enabling a DoS-like condition. Affected versions span Tomcat 11...

CVE-2025-52434 Apache Tomcat: APR/Native Connector crash leading to DoS

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 throug...

CVE-2025-52434 Apache Tomcat: APR/Native Connector crash leading to DoS

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 throug...

CVE-2025-52434

CVE-2025-52434 is a race-condition DoS in Apache Tomcat when using the APR/Native connector, observed in Tomcat 9.0.0.M1 through 9.0.106 (including older EOL lines) and potentially affecting selected Tomcat 8.x/11.x/10.x configurations via related advisories. The National Vulnerability Database d...

CVE-2025-52434 Apache Tomcat: APR/Native Connector crash leading to DoS

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 throug...

CVE-2025-49630

In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in modproxyhttp2. Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with...

PT-2025-29086 · Open Information Security Foundation +1 · Suricata +1

Name of the Vulnerable Software and Affected Versions: Suricata versions 7.0.10 and below Suricata versions 8.0.0-beta1 through 8.0.0-rc1 Description: Suricata, a network IDS, IPS, and NSM engine, is affected by an issue where mishandling of data on HTTP2 stream 0 can lead to uncontrolled memory...

Apache Tomcat 9.0.0.M1 < 9.0.107 multiple vulnerabilities

The version of Tomcat installed on the remote host is prior to 9.0.107. It is, therefore, affected by multiple vulnerabilities as referenced in the fixedinapachetomcat9.0.107security-9 advisory. - The vulnerability exists due to overflow in file upload limit. A remote attacker can send specially...