SRC-2016-0018 : ATutor LMS view_transcript File Disclosure Remote Code Execution Vulnerability

CVE ID:

N/A

CVSS Score:

6.5, (AV:N/AC:L/Au:S/C:P/I:P/A:P)

Affected Vendors:

ATutor

Affected Products:

ATutor 2.2.1 is confirmed, other versions may also be affected.

Vulnerability Details:

This vulnerability may allow remote attackers to execute arbitrary code on vulnerable installations of ATutor. Authentication is required to exploit this vulnerability however authentication bypass vulnerabilities are known and remote registration is open by default.

The specific flaw exists in the ‘mods/_standard/chat/view_transcript.php’ script. An attacker can use the ‘t’ parameter to disclose arbitrary files on the target system, readable by the web server. An attacker can combine this with other vulnerabilities to achieve remote code execution.

Vendor Response:

ATutor has issued an update to correct this vulnerability. More details can be found at: https://github.com/atutor/ATutor/commit/cbfe7a18a8bf43765064bde452f631c26a9298fe

Disclosure Timeline:

• 2016-03-20 – Vulnerability reported to vendor
• 2016-03-23 – Vendor confirmed issue
• 2016-03-23 – Vendor releases a patch
• 2016-03-23 – Coordinated public release of advisory

Credit:

This vulnerability was discovered by Steven Seeley of Source Incite