CVE-2021-21324 Insecure Direct Object Reference (IDOR) on "Solutions"
An authenticated attacker can enumerate user logins and other data by manipulating parameters in the GLPI knowbase search form.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21324?
CVE-2021-21324 is a medium-severity vulnerability in Glpi-Project Glpi, published on 8 Mar 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI before version 9.5.4 there is an Insecure Direct Object Reference (IDOR) on "Solutions". This vulnerability gives an unauthorized user the ability to enumerate GLPI items names (including users logins) using the knowbase search form (requires authentication). To Reproduce: Perform a valid authentication at your GLPI instance, Browse the ticket list and select any open ticket, click on Solution form, then Search a solution form that will redirect you to the endpoint /"glpi/front/knowbaseitem.php?item_itemtype=Ticket&item_items_id=18&forcetab=Knowbase$1", and the item_itemtype=Ticket parameter present in the previous URL will point to the PHP alias of glpi_tickets table, so just replace it with "Users" to point to glpi_users table instead; in the same way, item_items_id=18 will point to the related column id, so changing it too you should be able to enumerate all the content which has an alias. Since such id(s) are obviously incremental, a malicious party could exploit the vulnerability simply by guessing-based attempts.
Weakness: CWE-639
Which versions are affected by CVE-2021-21324?
It affects 1 product.
Products include Glpi-Project Glpi.
How do I fix CVE-2021-21324?
No fix has been published for CVE-2021-21324 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-21324 being exploited?
There is no known exploitation of CVE-2021-21324 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-jvwm-gq36-3v7v, UBUNTU-CVE-2021-21324.