Preface: IT world can’t without DHCP function! It looks like public vehicle in our daily life.
Background: dhcpcd is a DHCP and DHCPv6 client. It is currently the most feature-rich open source DHCP client.
Vulnerabilities Details: One of the vulnerabilities exists because the dhcp6_findna() function (src / dhcp6.c source code file) does not correctly handle reading specific addresses. The idea of exploiting this vulnerability involves modifying ebp to point to a part of the buffer where a return address can be read from, and at the same time, points to the payload within the same buffer. We so called 1-byte buffer overflows.R
Preface: On April 17, 2019, the National Information Security Vulnerability Sharing Platform (CNVD) recorded the Oracle WebLogic wls9-async deserialization remote command execution vulnerability reported by China Minsheng Banking Co., Ltd.
Synopsis: There are reports of this vulnerability being actively exploited in the wild in April 2019.
Vulnerability details: CVE-2019-2725 – A vulnerability has been discovered in the Oracle WebLogic components (WLS9_ASYNC and WLS-WSAT) that could allow for remote code execution. But this vulnerability seems not a zero-day. The similar vulnerability has been found in 2017. Perhaps attached diagram can provides hints to you.
Non official remedy: Option 1: Find and delete ws9_ async_response.war, wIs-wsat.war and restart the Weblogic service.
Option 2: Control access to URLs for /_async/* and /wls-wsat/* (note) paths through access policy control.
Preface: Error handling in PHP is still primitive. However you can code your way around most problems.
Synopsis: From technical point of view, a JPEG file with malicious EXIF data, and a PHP code that executes it. This PHP code can be easily inserted into any other PHP file found in the server, probably not noticed as malicious in a quick check.
Vulnerability details: PHP EXIF exif_iif_add_tag Heap Buffer Overflow Vulnerability – A successful exploit could allow the attacker to access sensitive information, which could be used to conduct additional attacks. PHP EXIF exif_process_IFD_in_MAKERNOTE Heap Buffer Overflow Vulnerability – A successful exploit could allow the attacker to access sensitive information, which could be used to conduct further attacks.
Preface: Operating system · Linux, NetBSD, FreeBSD, OpenBSD, macOS, Windows · Type · DNS server · License · Mozilla Public License (ISC license before 9.11). Website, www.isc.org/downloads/bind. BIND is the most widely used Domain Name System (DNS).
Alert: A design limitation of BIND let remote attacker could exploit these vulnerabilities to cause a denial-of-service condition. Official details shown as below:
Technical highlight: CVE-2018-5743 flaw impact the limiting simultaneous TCP clients is ineffective. It potentially lead to exhaustion of all available free file descriptors on that system. That is, when you open a file, the operating system creates an entry to represent that file and store the information about that opened file. So if there are 50 files opened in your OS then there will be 50 entries in OS (somewhere in kernel). So it may potential trigger additional unknown vulnerability.
Preface: Kiss O’Death Packet and Other NTP Vulnerabilities potentially turn back the Internet’s Clocks and causes unpredictable problem.
NTP vulnerability – historical record: There was a loophole in 2013,, the attack relies on the exploitation of the ‘monlist’ feature of NTP, as described in CVE-2013-5211, which is enabled by default on older NTP-capable devices. This command causes a list of the last 600 IP addresses which connected to the NTP server to be sent to the victim.
CVE-2019-11331 vulnerability details: The vulnerability is due to improper use of UDP port 123 by the affected software. Threat actor can make a malicious packet input to the targeted system. A successful exploit could allow the attacker to conduct an off-path attack.
Remedy: NTP.org had not released a security advisory. Stay tuned.
Preface: An IT ecosystem is “the network of organizations that drives the creation and delivery of information technology products and services.
About urllib3: Much of the Python ecosystem already uses urllib. It brings additional features that are missing from the Python standard libraries. For instance – Client-side SSL/TLS verification, Helpers for retrying requests and dealing with HTTP redirects,……
Vulnerability details: A vulnerability in urllib3 could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system.
Findings: The vulnerability exists because the affected software mishandles CA certificates that are related to the use of the ssl_context, ca_certs, or ca_certs_dir parameters.
Preface: We are all familiar with the .doc and .pdf formats. Because this is our choice in the business world.
Synopsis: Apache PDFBox is an open source pure-Java library that can be used to create, render, print, split, merge, alter, verify and extract text and meta-data of PDF files.
Vulnerability details: A vulnerability in Apache PDFBox could allow an unauthenticated, remote attacker to conduct an XML External Entity (XXE) attack on a targeted system. Apache PDFBox 2.0.14 does not properly initialize the XML parser, which allows context-dependent attackers to conduct XML External Entity (XXE) attacks via a crafted XFDF.
Preface: When I was young, I am afraid for Injection therapy. Yes, is my butt. Perhaps such circumstance is also apply to software application system!
Synopsis: Magento Commerce, providing end-to-end solutions that suit clients’ needs.
Vulnerability details: A vulnerability in Magento could allow an unauthenticated, remote attacker to conduct an SQL Injection attack against a targeted system. The vulnerability is due to the insufficient validation of user supplied input submitted to the affected software. An attacker could exploit this vulnerability by sending a request that submits malicious input to the targeted system.