CVE-2020-15877 Exposure of Resource to Wrong Sphere in LibreNMS

What is CVE-2020-15877?

CVE-2020-15877 is a high-severity missing authorization vulnerability in Librenms Librenms, published on 21 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in LibreNMS before 1.65.1. It has insufficient access control for normal users because of "'guard' => 'admin'" instead of "'middleware' => ['can:admin']" in routes/web.php.

Which versions are affected by CVE-2020-15877?

2 open source packages ship an affected version, including librenms/librenms. It affects 1 product.

Products include Librenms Librenms.

How do I fix CVE-2020-15877?

Upgrade librenms/librenms to 1.65.1 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-15877 being exploited?

There is no known exploitation of CVE-2020-15877 in the wild and no public exploit code.

Other vulnerabilities in Librenms Librenms

• CVE-2023-4982 Cross-site Scripting (XSS) - Stored in librenms/librenms Critical 9.8
• CVE-2022-29712 Command injection in librenms Critical 9.8
• CVE-2021-44278 Path traversal in librenms/librenms Critical 9.8
• CVE-2019-10665 LibreNMS Information Disclosure Critical 9.8
• CVE-2018-20434 LibreNMS arbitrary OS commands execution Critical 9.8

All Librenms Librenms vulnerabilities

Sources

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

Also known as GHSA-3c33-3465-fhx2.