cancel
Showing results for 
Search instead for 
Did you mean: 

2017-02-13 Instructure Advisory IAC16627 - XXE Vulnerability in Quizzes QTI Upload

wbillings
Instructure
Instructure
0 0 720

    SECURITY UPDATE

Canvas + Logo transparent (WHITE)- 300px.png

  Release Date:2017-02-13
  Description:

XXE Vulnerability in Quizzes QTI Upload

  Criticality Level:Critical
  Impact:

Potential read only access to underlying filesystem

  Systems Affected:Canvas LMS
  Solution Status:Patched
  Discovered By:

Unnamed BugCrowd Security Researcher as part of an annual vulnerability assessment

  Relevant Changesets:

don't resolve entities in xml · instructure/QTIMigrationTool@729a35313c · GitHub


Summary:

An external security audit discovered a vulnerability in the QTI Migration tool which is used in converting QTI version 1.x data into QTI 2.0 content packages. The vulnerability allowed read only access to the underlying filesystem. This means that a potential attacker could read files from various system level directories where configuration and system user details are stored.


An internal forensic investigation found no evidence that the vulnerability, which has existed on the system for some time, has been exploited during the time it was present on the system.

Status:

All systems were patched as of 13:21 MT on 2/3/2017


Labels