CVE-2010-4891 in Ke Yac
Summary
by MITRE
SQL injection vulnerability in the Yet Another Calendar (ke_yac) extension before 1.1.2 for TYPO3 allows remote attackers to execute arbitrary SQL commands via unspecified vectors.
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Analysis
by VulDB Data Team • 01/17/2018
The CVE-2010-4891 vulnerability represents a critical SQL injection flaw within the Yet Another Calendar extension for TYPO3 content management systems. This vulnerability specifically affects versions prior to 1.1.2 and exposes the system to remote code execution through maliciously crafted SQL commands. The issue arises from inadequate input validation and sanitization within the calendar extension's database interaction mechanisms, creating a pathway for attackers to manipulate database queries through user-controllable parameters.
The technical nature of this vulnerability aligns with CWE-89, which categorizes SQL injection as a direct consequence of insufficient input validation and improper query construction. The flaw operates by allowing unfiltered user input to be directly incorporated into SQL query strings without proper escaping or parameterization. Attackers can exploit this weakness by crafting malicious input that alters the intended query structure, potentially gaining unauthorized access to sensitive database information, modifying or deleting records, or even executing administrative commands on the underlying database system. The unspecified vectors mentioned in the description suggest that multiple entry points within the calendar extension could be exploited, making the vulnerability particularly dangerous as it may not be easily predictable or isolated.
The operational impact of this vulnerability extends beyond simple data compromise, as it can enable attackers to escalate privileges and potentially take complete control of the affected TYPO3 installation. Remote attackers can leverage this vulnerability to extract confidential information such as user credentials, database schemas, and application configuration details. The attack surface is particularly concerning given that TYPO3 installations often contain sensitive organizational data, making successful exploitation a significant security incident. Additionally, the vulnerability could facilitate further attacks within the network infrastructure if the compromised system serves as a gateway to other internal systems.
Mitigation strategies for CVE-2010-4891 should prioritize immediate patching of the affected ke_yac extension to version 1.1.2 or later, which contains the necessary input validation fixes. Organizations should implement comprehensive input sanitization measures, including parameterized queries and proper escaping techniques, to prevent similar vulnerabilities from occurring in other parts of their applications. Network segmentation and firewall rules can help limit the potential impact of successful exploitation attempts. Security monitoring should be enhanced to detect unusual database query patterns that might indicate SQL injection attacks, while regular vulnerability assessments should be conducted to identify and remediate similar issues across the entire application portfolio. The ATT&CK framework categorizes such vulnerabilities under T1190 - Exploit Public-Facing Application, emphasizing the need for robust application security controls and continuous monitoring of publicly accessible systems.