CVE-2020-5775 Server-side request forgery in Instructure Canvas Learning Management System (LMS)
Remote unauthenticated attackers can force Canvas LMS to make arbitrary HTTP GET requests, potentially accessing internal resources or bypassing network restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-5775?
CVE-2020-5775 is a medium-severity server-side request forgery vulnerability in Instructure Canvas Learning Management System (LMS), published on 21 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Server-Side Request Forgery in Canvas LMS 2020-07-29 allows a remote, unauthenticated attacker to cause the Canvas application to perform HTTP GET requests to arbitrary domains.
Weakness: CWE-918
Which versions are affected by CVE-2020-5775?
1 open source package ship an affected version, including canvaslms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
canvaslms Bitnami | From 2020-07-29.0.0 to 2020-07-29.0.0 | None |
Products include Instructure Canvas Learning Management Service.
How do I fix CVE-2020-5775?
No fix has been published for CVE-2020-5775 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2020-5775 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-5775 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Instructure Canvas Learning Management System (LMS)
Sources
Also known as BIT-canvaslms-2020-5775, GHSA-wp9p-6x4v-9fxx.