CVE-2009-4337 in Pd Calendar Today
Summary
by MITRE
SQL injection vulnerability in the Diocese of Portsmouth Calendar (pd_calendar) extension 0.4.1 and earlier for TYPO3 allows remote attackers to execute arbitrary SQL commands via unknown vectors, a different issue than CVE-2008-6691.
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Analysis
by VulDB Data Team • 08/30/2021
The vulnerability identified as CVE-2009-4337 represents a critical SQL injection flaw within the Diocese of Portsmouth Calendar extension version 0.4.1 and earlier for the TYPO3 content management system. This security weakness specifically affects the pd_calendar extension which is used to manage calendar events and related data within TYPO3 environments. The vulnerability stems from improper input validation and sanitization mechanisms that fail to adequately filter user-supplied data before incorporating it into database queries. Unlike CVE-2008-6691 which addressed a different class of vulnerabilities, this particular flaw allows remote attackers to manipulate the underlying database through carefully crafted input parameters that are not properly escaped or validated.
The technical exploitation of this SQL injection vulnerability occurs when the extension processes user inputs without sufficient sanitization measures, enabling attackers to inject malicious SQL code into database queries. The attack vector typically involves manipulating form fields, URL parameters, or API endpoints that interface with the calendar extension's database functionality. When the application fails to properly escape or parameterize user inputs, malicious SQL commands can be executed with the privileges of the database user account associated with the TYPO3 installation. This allows attackers to perform unauthorized database operations including data retrieval, modification, deletion, or even privilege escalation within the database system.
The operational impact of this vulnerability extends beyond simple data compromise as it provides attackers with extensive access to sensitive calendar information and potentially the entire database infrastructure. Remote attackers can exploit this vulnerability to extract confidential information such as event details, user credentials, or other sensitive data stored within the TYPO3 system. The attack surface is particularly concerning in environments where the Diocese of Portsmouth Calendar extension is deployed, as it may contain personal information, organizational data, or other sensitive calendar entries that could be accessed by unauthorized parties. Additionally, successful exploitation could enable attackers to modify or delete calendar entries, disrupt organizational scheduling systems, or establish persistent access points within the network infrastructure.
Organizations affected by this vulnerability should immediately implement mitigations including updating to the latest version of the pd_calendar extension where the SQL injection flaws have been addressed. The recommended approach involves applying the vendor-supplied patches or upgrading to versions that include proper input validation and sanitization mechanisms. Security configurations should be reviewed to ensure that database connections use minimal required privileges and that proper input filtering is implemented at multiple layers of the application architecture. Network segmentation and monitoring solutions should be deployed to detect potential exploitation attempts, while regular security assessments should be conducted to identify and remediate similar vulnerabilities in other extensions or components of the TYPO3 installation. This vulnerability aligns with CWE-89 which specifically addresses SQL injection flaws, and represents a clear violation of the principle of least privilege and proper input validation as outlined in various cybersecurity frameworks including those referenced in the MITRE ATT&CK framework for database access techniques.