CVE-2014-7847 Moodle allows attackers to cause a denial of service

What is CVE-2014-7847?

CVE-2014-7847 is a medium-severity denial of service vulnerability in Moodle Moodle, published on 24 Nov 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

iplookup/index.php in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allows remote attackers to cause a denial of service (resource consumption) by triggering the calculation of an estimated latitude and longitude for an IP address.

Weakness: CWE-399

Which versions are affected by CVE-2014-7847?

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

Products include Moodle Moodle.

How do I fix CVE-2014-7847?

Upgrade moodle/moodle to a fixed version for your release line: 2.5.9, 2.6.6 or 2.7.3.

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-2014-7847 being exploited?

There is no known exploitation of CVE-2014-7847 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-6vjg-2q57-rgfw.