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Spring

PreviousFrameworksNextCMS

Last updated 9 months ago

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Information

Technology
Description

A framework for building Java applications.

A Spring extension that simplifies the configuration of Spring apps by providing defaults and conventions to minimize the boilerplate code required.

Recon

The default error page (/error) for Spring applications are titled with the Whitelabel Error Page message (Figure 1).

Attacks

Fuzzing

ffuf -u http://cozyhosting.htb/FUZZ -w /usr/share/wordlists/seclists/Discovery/Web-Content/spring-boot.txt -c -ac -ic

Actuators

Config Files

We successfully managed to read the application.properties file which contains plaintext credentials as well as an admin portal key (Figure 3).

We can use seclists's .

Spring Boot's is a set of built-in monitoring and debugging features and its endpoints should not be public facing. For instance, lists active HTTP Spring sessions. For an example of leveraging an actuator for session hijacking see .

will load properties from the application.propertie file which is typically under the webroot (/) or the config subdirectory. This file can contain sensitive information, such as credentials and database information.

The example below is based on OffSec's course (Asio lab).

Spring applications will load properties from files which are typically located under the webroot (/) or the config subdirectory. We can use Burp Intruder along with the default wordlist called Fuzzing - path traversal (single file) (Figure 2.2) and a Match/replace rule (Figure 2.3) to search for the application.properties file.

Spring boot-specific wordlist
Spring applications
WEB-200
application.properties
Spring
Spring Boot
actuators
/actuator/sessions
Figure 1: The default error page of a Spring-based application.
Figure 2: Fuzzing for the target file.
Figure 3: Reading the applications.properties configuration file.
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