CVE-2015-2268 Moodle allows attackers to cause a denial of service

What is CVE-2015-2268?

CVE-2015-2268 is a medium-severity denial of service vulnerability in Moodle Moodle, published on 1 Jun 2015. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

filter/urltolink/filter.php in Moodle through 2.5.9, 2.6.x before 2.6.9, 2.7.x before 2.7.6, and 2.8.x before 2.8.4 allows remote authenticated users to cause a denial of service (CPU consumption or partial outage) via a crafted string that is matched against an improper regular expression.

Weakness: CWE-399

Which versions are affected by CVE-2015-2268?

6 open source packages ship an affected version, including moodle/moodle. It affects 1 product.

Products include Moodle Moodle.

How do I fix CVE-2015-2268?

Upgrade moodle/moodle to a fixed version for your release line: 2.6.9, 2.7.6 or 2.8.4.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-2268 being exploited?

There is no known exploitation of CVE-2015-2268 in the wild and no public exploit code.

Other vulnerabilities in Moodle Moodle

• CVE-2006-4935 File upload in n/a Critical 10.0
• CVE-2006-4936 Moodle does not properly validate module instance id Critical 10.0
• CVE-2004-2233 Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors. Critical 10.0
• CVE-2004-2235 Cross-site scripting in n/a Critical 10.0
• CVE-2004-2236 Other in n/a Critical 10.0

All Moodle Moodle vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-36cm-vrqh-8p98.