Apache

Apache Flink Arbitrary Jar Package Upload Threat Alert

December 10, 2019

Overview

Recently, researchers have discovered the Apache Flink Jar package to upload the attack data. Attackers can exploit this vulnerability to upload a Jar package containing malicious code without authorization, thereby taking control of the target server. (more…)

Advisory: Apache Flink Remote Code Execution Vulnerability

December 2, 2019

Overview

Recently, a security researcher announced a remote code execution vulnerability in Apache Flink Dashboard. The vulnerability does not require an attacker to authenticate, and a malicious Jar package can be uploaded via the dashboard to execute the code remotely. NSFOCUS researchers also made a successful re-enactment through research, confirming that they can attack the latest version of Flink. (more…)

Advisory: Apache Shiro RememberMe Padding Oracle Vulnerability

November 30, 2019

Vulnerability Description

In September 2019, Apache officially released a vulnerability topic “RememberMe Padding Oracle Vulnerability” numbered SHIRO-721. The issue pointed out that because the RememberMe field of the Apache Shiro cookie is encrypted by the AES-128-CBC mode, Shiro is vulnerable to Padding Oracle attacks. An attacker can use the Legal RememberMe cookie as the Padding Oracle attack prefix to construct RememberMe to trigger a Java deserialization attack. The attacker does not need to know the RememberMe encryption key when executing an attack. Apache Shiro is a powerful and easy-to-use Java security framework for performing authentication, authorization, passwords, and session management. Recently, it has been found that the use of this vulnerability has been spread in a small scope, and relevant users should take measures to protect against this vulnerability as soon as possible. (more…)

Apache Solr velocity Remote Code Execution Vulnerability Handling Guide

November 12, 2019

Vulnerability Description

On October 30, @_S00pY disclosed the exploitation of Apache Solr Remote Code Execution Vulnerability, which allows attackers to implement remote code execution via velocity templates. After testing, the vulnerability can be successfully triggered, and no official security patch has been released. (more…)

Apache Tomcat DoS Vulnerability (CVE-2019-0199) Threat Alert

March 28, 2019

1 Vulnerability Overview

Recently, The Apache Software Foundation announced the existence of a denial-of-service (DoS) vulnerability in Apache Tomcat HTTP/2. Specifically, the HTTP/2 implementation accepts streams with excessive numbers of SETTINGS frames and also permits clients to keep streams open without reading/writing request/response data. Thus, too many connection requests from clients can cause server-side thread exhaustion. Successful exploitation of this vulnerability would result in a denial of service on the target. (more…)