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CVE-2021-21324— Insecure Direct Object Reference (IDOR) on "Solutions"

Quick assessment

Affected
glpi-project glpi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GLPI是个人开发者的一款开源IT和资产管理软件。该软件提供功能全面的IT资源管理接口，你可以用它来建立数据库全面管理IT的电脑，显示器，服务器，打印机，网络设备，电话，甚至硒鼓和墨盒等。 GLPI 存在安全漏洞，未经授权的用户能够使用knowbase搜索表单枚举GLPI项目名称。

CVSS 6.8 · Medium EPSS 1.42% · P72

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2021-21324

Vulnerability Information
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Vulnerability Title
Insecure Direct Object Reference (IDOR) on "Solutions"
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
GLPI 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GLPI是个人开发者的一款开源IT和资产管理软件。该软件提供功能全面的IT资源管理接口，你可以用它来建立数据库全面管理IT的电脑，显示器，服务器，打印机，网络设备，电话，甚至硒鼓和墨盒等。 GLPI 存在安全漏洞，未经授权的用户能够使用knowbase搜索表单枚举GLPI项目名称。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
glpi-project glpi < 9.5.4 -

II. Public POCs for CVE-2021-21324

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III. Intelligence Information for CVE-2021-21324

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Patches & Fixes for CVE-2021-21324 (1)

Other References for CVE-2021-21324 (1)

Same Patch Batch · glpi-project · 2021-03-08 · 4 CVEs total

CVE-2021-21326 7.7 HIGH Horizontal Privilege Escalation
CVE-2021-21327 6.8 MEDIUM Unsafe Reflection in getItemForItemtype()
CVE-2021-21325 6.2 MEDIUM Stored XSS in budget type

IV. Related Vulnerabilities

Same product: glpi
Same vendor: glpi-project
Same weakness: CWE-639

V. Comments for CVE-2021-21324

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