CVE-2020-23811: xxl-job sensitive data exposure

Background

xxl-job is a Maven package that provides job scheduling and management capabilities. It is commonly used in Java applications to handle background tasks and job execution. This vulnerability affects version 2.2.0 of xxl-job. The package allows the exposure of sensitive information, including usernames, models, and passwords, through the UserController.java file.

Vulnerability Detail

The vulnerability in xxl-job 2.2.0 allows an attacker to access sensitive data by exploiting the UserController.java file. This file contains code that inadvertently exposes usernames, models, and passwords. An attacker with access to this information can potentially gain unauthorized access to the system and perform malicious actions. The severity of this vulnerability is rated as HIGH with a CVSS score of 7.5.

Workaround

As a temporary workaround, users can modify the UserController.java file to remove or obfuscate the sensitive data. This can be achieved by modifying the code responsible for handling the sensitive information and ensuring it is not exposed in any responses or logs. Here is an example of how the code can be modified:

// Remove sensitive data from UserController.java

// Before
return new ResponseEntity<>(user, HttpStatus.OK);

// After
user.setPassword(null);
return new ResponseEntity<>(user, HttpStatus.OK);

Conclusion

The xxl-job package version 2.2.0 is vulnerable to sensitive data exposure. It is crucial to upgrade to a patched version of xxl-job to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.

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