CVE-2017-6757 in Unified Communications Manager
Summary
by MITRE
A vulnerability in Cisco Unified Communications Manager 10.5(2.10000.5), 11.0(1.10000.10), and 11.5(1.10000.6) could allow an authenticated, remote attacker to conduct a blind SQL injection attack. The vulnerability is due to a failure to validate user-supplied input used in SQL queries that bypass protection filters. An attacker could exploit this vulnerability by sending crafted URLs that include SQL statements. An exploit could allow the attacker to modify or delete entries in some database tables, affecting the integrity of the data. Cisco Bug IDs: CSCve13786.
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Analysis
by VulDB Data Team • 01/07/2021
The vulnerability identified as CVE-2017-6757 affects Cisco Unified Communications Manager versions 10.5(2.10000.5), 11.0(1.10000.10), and 11.5(1.10000.6) and represents a critical blind SQL injection flaw that enables authenticated remote attackers to compromise the integrity of database systems. This vulnerability stems from insufficient input validation mechanisms within the application's SQL query processing functionality, specifically failing to properly sanitize user-supplied data before incorporating it into database operations. The flaw manifests when the system processes crafted URLs containing malicious SQL statements, allowing attackers to manipulate database queries through legitimate authenticated sessions.
The technical exploitation of this vulnerability follows a classic blind SQL injection pattern where the attacker leverages a valid authentication session to send malformed URL parameters that bypass existing security filters designed to prevent SQL injection attacks. This weakness directly maps to CWE-89, which categorizes SQL injection vulnerabilities as a fundamental flaw in data validation and input sanitization processes. The vulnerability's impact extends beyond simple data retrieval to include destructive operations such as data modification and deletion within database tables, potentially compromising the entire communication infrastructure managed by the Unified Communications Manager. Attackers can exploit this flaw to gain unauthorized access to sensitive telephony data, manipulate user accounts, and potentially disrupt critical communication services.
Operationally, this vulnerability presents a significant risk to enterprise communication systems as it allows remote attackers with valid credentials to compromise database integrity without requiring additional privileges or complex attack vectors. The implications include potential data corruption, unauthorized access to user information, and disruption of voice communication services that organizations rely upon for business continuity. The vulnerability's classification as a blind SQL injection means that attackers cannot directly observe query results, making detection more challenging while still enabling substantial damage through careful exploitation techniques. Organizations using affected Cisco Unified Communications Manager versions face potential compliance violations and security breaches that could impact regulatory requirements for data protection and integrity.
Mitigation strategies for CVE-2017-6757 require immediate implementation of Cisco's security patches and updates addressing the specific SQL injection vulnerability in the affected software versions. Organizations should implement network segmentation to limit access to the Unified Communications Manager systems and enforce strict access controls for administrative functions. Security monitoring should include detection of unusual URL patterns and database access attempts that could indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol manipulation and T1046 for network service scanning, indicating that defensive measures should focus on both network-level monitoring and application-layer security controls. Regular security assessments and input validation reviews should be conducted to prevent similar vulnerabilities in other components of the communication infrastructure. Additionally, implementing web application firewalls and database activity monitoring solutions can provide additional layers of protection against SQL injection attacks targeting the Unified Communications Manager platform.