#VU40734 Input validation error in Moodle - CVE-2015-3177

Vulnerability identifier: #VU40734

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-2015-3177

CWE-ID: CWE-20

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.

Moodle 2.8.x before 2.8.6 does not consider the tool/monitor:subscribe capability before entering subscriptions to site-wide event-monitor rules, which allows remote authenticated users to obtain sensitive information via a subscription request.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 2.8 - 2.8.5

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50039
https://openwall.com/lists/oss-security/2015/05/18/1
https://www.securityfocus.com/bid/74721
https://www.securitytracker.com/id/1032358
https://moodle.org/mod/forum/discuss.php?d=313684

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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.