#VU43892 Input validation error in Moodle - CVE-2011-4305

Vulnerability identifier: #VU43892

Vulnerability risk: Low

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

CVE-ID: CVE-2011-4305

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 perform service disruption.

message/refresh.php in Moodle 1.9.x before 1.9.14 allows remote authenticated users to cause a denial of service (infinite request loop) via a URL that specifies a zero wait time for message refreshing.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 1.9 - 1.9.13

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External links
https://git.moodle.org/gw?p=moodle.git;a=commit;h=97f258fabb3ebfa7acc7c02cb59de92b01710f99
https://moodle.org/mod/forum/discuss.php?d=188318
https://bugzilla.redhat.com/show_bug.cgi?id=747444

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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.