#VU41081 Information disclosure in Moodle - CVE-2014-7831

Vulnerability identifier: #VU41081

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2014-7831

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote #AU# to gain access to sensitive information.

lib/classes/grades_external.php in Moodle 2.7.x before 2.7.3 does not consider the moodle/grade:viewhidden capability before displaying hidden grades, which allows remote authenticated users to obtain sensitive information by leveraging the student role to access the get_grades web service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 2.5 - 2.5.8, 2.6 - 2.6.5, 2.7 - 2.7.2

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47766
https://openwall.com/lists/oss-security/2014/11/17/11
https://www.securitytracker.com/id/1031215
https://moodle.org/mod/forum/discuss.php?d=275153

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.