CVE-2024-34082: Grav Arbitrary File Read to Account Takeover
First published: Wed May 15 2024(Updated: )
### Summary A low privilege user account with page edit privilege can read any server files using Twig Syntax. This includes Grav user account files - /grav/user/accounts/*.yaml. This file stores hashed user password, 2FA secret, and the password reset token. This can allow an adversary to compromise any registered account by resetting a password for a user to get access to the password reset token from the file or by cracking the hashed password. ### Proof Of Concept `{{ read_file('/var/www/html/grav/user/accounts/riri.yaml') }}` Use the above Twig template syntax in a page and observe that the administrator riri's authentication details are exposed accessible by any unauthenticated user.  As an additional proof of concept for reading system files, observe the `/etc/passwd` file read using the following Twig syntax: `{{ read_file('/etc/passwd') }}`  ### Impact This can allow a low privileged user to perform a full account takeover of other registered users including Adminsitrators. This can also allow an adversary to read any file in the web server.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/getgrav/grav | <1.7.46 | 1.7.46 |
| Getgrav | <1.7.46 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-34082?
CVE-2024-34082 is classified as a low severity vulnerability.
How do I fix CVE-2024-34082?
To fix CVE-2024-34082, upgrade Grav to version 1.7.46 or later.
What does CVE-2024-34082 allow a low privilege user to access?
CVE-2024-34082 allows a low privilege user to read any server files using Twig Syntax, including hashed user password files.
What type of software is affected by CVE-2024-34082?
CVE-2024-34082 affects the Grav content management system.
What is stored in the files that can be accessed due to CVE-2024-34082?
The accessed files can store hashed user passwords, 2FA secrets, and password reset tokens.
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