CVE-2017-9848 in EasySite
Summary
by MITRE
SQL injection vulnerability in C_InfoService.asmx in WebServices in Easysite 7.0 could allow remote attackers to execute arbitrary SQL commands via an XML document containing a crafted ArticleIDs element within a GetArticleHitsArray element.
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Analysis
by VulDB Data Team • 10/20/2019
The vulnerability identified as CVE-2017-9848 represents a critical SQL injection flaw within the Easysite 7.0 content management system's WebServices component. This vulnerability specifically affects the C_InfoService.asmx web service interface which processes XML requests containing article hit data. The flaw exists in how the system handles XML input, particularly when processing the ArticleIDs element nested within the GetArticleHitsArray element. Attackers can exploit this weakness by crafting malicious XML documents that manipulate the underlying database query execution flow. The vulnerability stems from insufficient input validation and sanitization of user-supplied data within the web service layer, creating a direct pathway for arbitrary SQL command execution.
The technical implementation of this vulnerability aligns with CWE-89, which categorizes SQL injection flaws as weaknesses in software that allows attackers to manipulate database queries through untrusted input. The flaw operates at the application layer where XML parsing occurs, making it a classic example of improper input validation. When the C_InfoService.asmx web service processes the crafted XML document, it fails to properly escape or sanitize the ArticleIDs parameter before incorporating it into SQL queries. This allows attackers to inject malicious SQL syntax that gets executed against the underlying database. The vulnerability is particularly dangerous because it enables remote code execution without requiring authentication, as the web service is accessible over the network.
The operational impact of CVE-2017-9848 extends beyond simple data theft to encompass complete system compromise. An attacker who successfully exploits this vulnerability can execute arbitrary database commands including but not limited to data extraction, modification, or deletion. The attack surface is significant as it affects the entire Easysite 7.0 installation, potentially compromising all content management data, user credentials, and system configurations. This vulnerability can be leveraged for persistent access, data exfiltration, and further network reconnaissance. The remote nature of the exploit means that attackers can target systems from anywhere on the internet without requiring physical access or local network presence, making it particularly attractive for automated attack campaigns.
Mitigation strategies for this vulnerability should include immediate patching of the Easysite 7.0 software to the latest available version that addresses the SQL injection flaw. Organizations should implement proper input validation and sanitization measures at the application level, specifically ensuring that XML parsing routines properly escape or validate all user-supplied input before database interaction. Network segmentation and firewall rules should be implemented to restrict access to the C_InfoService.asmx endpoint to trusted sources only. Additionally, implementing web application firewalls and intrusion detection systems can help identify and block malicious XML payloads attempting to exploit this vulnerability. Regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to ensure the effectiveness of implemented controls. The ATT&CK framework categorizes this vulnerability under the technique of SQL Injection (T1073) and potentially T1566 for initial access through web services, highlighting the multi-faceted nature of the threat landscape this vulnerability creates.