CVE-2020-29556 Grav CMS Local File Injection
Authenticated or unauthenticated attackers can read arbitrary local files on the server via path traversal in Grav CMS backup functionality.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-29556?
CVE-2020-29556 is a medium-severity path traversal vulnerability in n/a, published on 15 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)
Weakness: CWE-22
Which versions are affected by CVE-2020-29556?
4 open source packages ship an affected version, including getgrav/grav. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | All versions | 1.6.30 |
getgrav/grav Packagist | All versions | 1.6.30 |
getgrav/grav Packagist | From 1.7.0-beta.1 to 1.7.0-rc.17 | None |
getgrav/grav Packagist | From 1.7.0-beta.1 to 1.7.0-rc.17 | None |
Products include Getgrav Grav Cms.
How do I fix CVE-2020-29556?
Upgrade getgrav/grav to 1.6.30 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-29556 being exploited?
There is no known exploitation of CVE-2020-29556 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-r3rg-jrjq-w4mr.