CVE-2019-9936 Explained : Impact and Mitigation
Learn about the vulnerability in SQLite version 3.27.2 (CVE-2019-9936) that could lead to an information leak. Find out how to mitigate the risk and prevent exploitation.
In the latest release of SQLite, version 3.27.2, a vulnerability exists that could lead to an information leak when executing fts5 prefix queries within a transaction. This vulnerability is located in the fts5HashEntrySort function in sqlite3.c.
Understanding CVE-2019-9936
This CVE pertains to a specific vulnerability in SQLite version 3.27.2 that could potentially result in an information leak.
What is CVE-2019-9936?
SQLite 3.27.2 is susceptible to a heap-based buffer over-read in the fts5HashEntrySort function when running fts5 prefix queries within a transaction. The issue is specifically related to the ext/fts5/fts5_hash.c module.
The Impact of CVE-2019-9936
The vulnerability in SQLite 3.27.2 could allow malicious actors to trigger an over-read of a heap-based buffer, potentially leading to an information leak.
Technical Details of CVE-2019-9936
SQLite version 3.27.2 is affected by a specific vulnerability that can be exploited under certain conditions.
Vulnerability Description
Executing fts5 prefix queries within a transaction in SQLite 3.27.2 can trigger a heap-based buffer over-read in the fts5HashEntrySort function, potentially resulting in an information leak.
Affected Systems and Versions
- Product: SQLite
- Vendor: N/A
- Version: 3.27.2
Exploitation Mechanism
The vulnerability can be exploited by executing fts5 prefix queries within a transaction in SQLite 3.27.2, leading to the over-read of a heap-based buffer.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-9936.
Immediate Steps to Take
- Update SQLite to a patched version that addresses the vulnerability.
- Monitor for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software and applications to the latest versions to mitigate known vulnerabilities.
- Implement proper access controls and security measures to prevent unauthorized access to sensitive data.
Patching and Updates
Ensure that SQLite is regularly updated with the latest security patches to protect against known vulnerabilities.