#VU43498 Permissions, Privileges, and Access Controls in Moodle - CVE-2012-4400

Vulnerability identifier: #VU43498

Vulnerability risk: Low

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

CVE-ID: CVE-2012-4400

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote #AU# to manipulate data.

repository/repository_ajax.php in Moodle 2.2.x before 2.2.5 and 2.3.x before 2.3.2 allows remote authenticated users to bypass intended upload-size restrictions via a -1 value in the maxbytes field.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 2.2 - 2.2.4, 2.3 - 2.3.1

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-30792
https://moodle.org/mod/forum/discuss.php?d=211555
https://openwall.com/lists/oss-security/2012/09/17/1

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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.