• Skip to main content

Naga Cyber Defense

Trusted Security for all of Indonesia

  • Home
  • About
  • Programs
  • Contact
  • Blog
You are here: Home / News / Perusahaan keamanan Blumira menemukan vektor serangan Log4j baru yang besar

Perusahaan keamanan Blumira menemukan vektor serangan Log4j baru yang besar

December 18, 2021 by Søren

Dalam serangan proof-of-concept mereka, Blumira menemukan bahwa dengan menggunakan salah satu dari banyak eksploitasi Java Naming and Directory Interface (JNDI) yang dapat mereka picu melalui URL jalur file menggunakan koneksi WebSocket ke mesin dengan pustaka Log4j2 yang rentan terinstal.

Semua yang diperlukan untuk memicu keberhasilan adalah permintaan jalur yang dimulai pada pemuatan halaman web. Sederhana, tapi mematikan.

Lebih buruk lagi, itu tidak perlu menjadi localhost. WebSockets memungkinkan koneksi ke IP apa pun. Biarkan saya ulangi, “Any IP” dan itu termasuk ruang IP pribadi.

Selanjutnya, saat halaman dimuat, itu akan memulai koneksi WebSocket lokal, menekan server pendengar yang rentan, dan terhubung melalui jenis koneksi yang diidentifikasi berdasarkan string koneksi JNDI.

Para peneliti melihat yang paling sukses memanfaatkan Java Remote Method Invocation (RMI). port default 1099., meskipun kita sering melihat port kustom digunakan.

Pemindaian port sederhana, teknik yang sudah ada di buku pegangan peretas, WebSocket, adalah jalan termudah menuju serangan yang berhasil.

Kemudian, port terbuka ke layanan lokal atau layanan yang dapat diakses oleh host ditemukan, kemudian dapat menjatuhkan string eksploit JNDI di jalur atau parameter.

“Ketika ini terjadi, host yang rentan memanggil server exploit, memuat kelas penyerang, dan mengeksekusinya dengan java.exe sebagai proses induk.” Kemudian penyerang dapat menjalankan apa pun yang dia inginkan.

Selengkapnya: ZDNet

Tagged With: Log4j, Vulnerability

Copyright © 2025 · Naga Cyber Defense · Sitemap

Cookies Settings
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
AcceptReject AllCookie Settings
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
CookieDurationDescription
_ga2 yearsThe _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
_gat_gtag_UA_172707709_11 minuteSet by Google to distinguish users.
_gid1 dayInstalled by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
non-necessary
SAVE & ACCEPT
Powered by CookieYes Logo