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Missing Authorization

CVE-2023-23611

Medium
5.4/10

Summary

LTI Consumer XBlock implements the consumer side of the LTI specification enabling integration of third-party LTI provider tools. Package lti-consumer-xblock versions 7.0.0 through 7.2.1 are vulnerable to Missing Authorization. Any LTI tool that is integrated with the Open edX platform can post a grade back for any LTI XBlock so long as it knows or can guess the block location for that XBlock. An LTI tool submits scores to the edX platform for line items. The code that uploads that score to the LMS grade tables determines which XBlock to upload the grades for by reading the "resource_link_id" field of the associated line item. The LTI tool may submit any value for the "resource_link_id" field, allowing a malicious LTI tool to submit scores for any LTI XBlock on the platform. The impact is a loss of integrity for LTI XBlock grades.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • LOW
  • LOW
  • NONE

CWE-862 - Missing Authorization

The missing authorization vulnerability occurs when a software program allows users to access privileged parts of the program without verifying the user credentials. Impact of such a vulnerability depends on the resources employed by the software, ranging from account takeover to sensitive information exposure, denial of service, and complete system takeover.

References

Advisory Timeline

  • Published