CVE-2020-26212 Any GLPI CalDAV calendars is read-only for every authenticated user
Any authenticated user can read other users' personal and group calendars via CalDAV, exposing sensitive scheduling data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-26212?
CVE-2020-26212 is a high-severity missing authorization vulnerability in Glpi-Project Glpi, published on 25 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
GLPI stands for Gestionnaire Libre de Parc Informatique and it is a Free Asset and IT Management Software package, that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI before version 9.5.3, any authenticated user has read-only permissions to the planning of every other user, even admin ones. Steps to reproduce the behavior: 1. Create a new planning with 'eduardo.mozart' user (from 'IT' group that belongs to 'Super-admin') into it's personal planning at 'Assistance' > 'Planning'. 2. Copy the CalDAV url and use a CalDAV client (e.g. Thunderbird) to sync the planning with the provided URL. 3. Inform the username and password from any valid user (e.g. 'camila' from 'Proativa' group). 4. 'Camila' has read-only access to 'eduardo.mozart' personal planning. The same behavior happens to any group. E.g. 'Camila' has access to 'IT' group planning, even if she doesn't belong to this group and has a 'Self-service' profile permission). This issue is fixed in version 9.5.3. As a workaround, one can remove the `caldav.php` file to block access to CalDAV server.
Weakness: CWE-862
Which versions are affected by CVE-2020-26212?
It affects 1 product.
Products include Glpi-Project Glpi.
How do I fix CVE-2020-26212?
No fix has been published for CVE-2020-26212 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-26212 being exploited?
There is no known exploitation of CVE-2020-26212 in the wild and no public exploit code.
Other vulnerabilities in Glpi-Project Glpi
- CVE-2022-35914 Teclib GLPI Remote Code Execution
- CVE-2023-42802 GLPI vulnerable to unallowed PHP script execution
- CVE-2023-28849 GLPI vulnerable to SQL injection and Stored XSS via inventory agent request
- CVE-2022-35947 SQL injection in GLPI
- CVE-2022-31056 SQL injection with _actor parameter in GLPI
Sources
Also known as GHSA-qmw3-87hr-5wgx.