CVE-2017-13685 in SQLite
Summary
by MITRE
The dump_callback function in SQLite 3.20.0 allows remote attackers to cause a denial of service (EXC_BAD_ACCESS and application crash) via a crafted file.
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Analysis
by VulDB Data Team • 12/27/2022
The vulnerability identified as CVE-2017-13685 represents a critical denial of service flaw within SQLite version 3.20.0, specifically affecting the dump_callback function. This issue enables remote attackers to trigger system instability through carefully crafted malicious files, resulting in application crashes and potential system-wide disruptions. The vulnerability stems from improper handling of memory access patterns during the callback execution process, creating a scenario where unauthorized input can lead to memory corruption and subsequent system failures.
The technical root cause of this vulnerability lies in the dump_callback function's insufficient validation of input parameters and memory management practices. When a malicious file is processed through this function, the application encounters an EXC_BAD_ACCESS exception, which is a memory access violation commonly occurring when programs attempt to read or write to protected memory regions. This particular flaw falls under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write vulnerabilities. The vulnerability demonstrates characteristics consistent with memory safety issues that are frequently exploited in software exploitation frameworks.
The operational impact of CVE-2017-13685 extends beyond simple application crashes to potentially compromise entire systems that rely on SQLite for data management. Attackers can leverage this vulnerability to perform remote denial of service attacks against applications using SQLite 3.20.0, causing service unavailability and potential data integrity concerns. The vulnerability affects systems where SQLite is used for database operations, particularly in web applications, mobile platforms, and embedded systems that process untrusted data inputs. This flaw can be particularly dangerous in environments where continuous system availability is critical, as it provides attackers with a straightforward method to disrupt services.
From an attack perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the T1499 category, which covers network denial of service attacks. The flaw can be exploited through various attack vectors including web application requests, file uploads, or database connection attempts. Security professionals should note that this vulnerability does not require special privileges to exploit, making it particularly concerning for systems that process untrusted input from external sources. The attack surface is broad due to SQLite's widespread adoption across numerous applications and platforms.
Mitigation strategies for CVE-2017-13685 primarily focus on immediate software updates to newer SQLite versions where this vulnerability has been addressed. Organizations should prioritize upgrading to SQLite 3.20.1 or later versions that contain the necessary patches for the dump_callback function. Additionally, implementing input validation measures and sandboxing techniques can provide additional protection layers against exploitation attempts. Network segmentation and monitoring systems should be configured to detect unusual patterns of database access that might indicate exploitation attempts. Security teams should also consider implementing automated patch management processes to ensure timely deployment of security updates across all affected systems. The vulnerability serves as a reminder of the importance of maintaining up-to-date software components and the critical role of proper memory management in preventing exploitation of similar flaws in database management systems.