scan4log4shell - Scanner to send specially crafted requests and cat

项目说明

scan4log4shell

> Scanner to send specially crafted requests and catch callbacks of systems that are impacted by log4j log4shell and to detect log4j on your local file-system

Features

Local and remote scanner

Supports URL and CIDR scans

Supports DNS, LDAP & TCP callbacks for discovery and

Fuzzing of 50 HTTP request headers by default

Fuzzing of HTTP POST data parameters

Fuzzing of JSON data parameters

HTTP Form detection & fuzzing

Auth detection & fuzzing (Basic & Bearer)

WAF Bypass payloads

Background

C is a remote code execution (RCE) in Apache Log4j 2. An unauthenticated, remote attacker could exploit this flaw by sending a specially crafted request to a ser a of log4j. The crafted request uses a Ja and Directory Interface (JNDI) injection via a of services including:

Lightweight Directory Access Protocol (LDAP)

Secure LDAP (LDAPS)

Remote Method In (RMI)

Domain Name Service (DNS)

:warning: There is a patch bypass on Log4J v2.15.0: C

:warning: Log4J v2.16 High Se discovered: C

Installing

You can install the pre-compiled binary in several different ways

homebrew tap:

scoop:

deb/rpm/apk:

Download the .deb, .rpm or .apk from the releases page and install them with the appropriate tools.

manually:

Download the pre-compiled binaries from the releases page and copy to the desired location.

Building from source

Install a Go 1.17 compiler.
Most system Go compiler come with OS are older than 1.17.

Run the following command in the checked-out repository:

(Add the appropriate .exe extension on Windows systems, of course.)

Docker Support

Usage

Catch

Start a standalone callback catcher

Local

Detect log4j on your file-system

Example

Remote

Send specially crafted requests and catch callbacks of systems that are impacted by log4j log4shell

Remote CIDR

Send specially crafted requests to a cidr

Remote url

Send specially crafted requests to an url

Example

Custom Payloads

If you specify a file with custom payloads, you can use the following placeholders for callback address and resource:

{{ .CADDR }}

{{ .Resource }}

For example:

You can find more examples here

References

License

MIT

项目信息

开发语言：Go

Star 数：12

技术要点

该项目属于安全软件方向的开源资源，代码结构清晰，适合安全研究人员学习参考。项目围绕Scanner to send specially crafted requests and catch callbacks of systems that are impacted by log4j log4shell vulnerability and to detect vulnerable log4j versions on your local file-system展开，提供了可运行的实现，对理解相关安全机制、工具原理与攻防技术具有较高的研究价值。

从技术实现角度看，此类项目的核心在于对底层原理的深入理解与工程化落地。开发者在研究过程中可以结合官方文档与社区讨论，梳理项目的初始化流程、核心模块职责与数据流转，逐步掌握其中的技术细节与设计思路。

使用与学习建议

1. 下载源码压缩包，解压到本地环境。

2. 根据项目类型准备对应的运行环境与依赖。

3. 按照 README 中的步骤完成配置与部署。

4. 在隔离的测试环境中运行验证，避免影响生产系统。

免责声明

本资源来源于开源社区，仅供安全研究、技术学习与合法授权范围内的攻防演练使用，请勿用于任何非法或侵害他人权益的用途。使用本项目产生的一切后果由使用者自行承担。