CVE-2020-11656 Explained : Impact and Mitigation
Learn about CVE-2020-11656, a use-after-free vulnerability in SQLite through 3.31.1, allowing attackers to execute arbitrary code or cause denial of service. Find mitigation steps and prevention measures here.
In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free vulnerability, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.
Understanding CVE-2020-11656
This CVE involves a specific vulnerability in SQLite that could have significant implications.
What is CVE-2020-11656?
SQLite through version 3.31.1 is affected by a use-after-free vulnerability in the ALTER TABLE implementation, specifically related to an ORDER BY clause within a compound SELECT statement.
The Impact of CVE-2020-11656
The vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the use-after-free issue in SQLite.
Technical Details of CVE-2020-11656
Understanding the technical aspects of this CVE is crucial for effective mitigation.
Vulnerability Description
The vulnerability in SQLite through 3.31.1 arises from a use-after-free condition in the ALTER TABLE implementation, triggered by an ORDER BY clause within a compound SELECT statement.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions up to and including 3.31.1
Exploitation Mechanism
Exploiting this vulnerability involves crafting a malicious ORDER BY clause within a compound SELECT statement to trigger the use-after-free condition in SQLite.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are essential to mitigate the risks associated with CVE-2020-11656.
Immediate Steps to Take
- Update SQLite to a patched version that addresses the use-after-free vulnerability.
- Monitor for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Conduct security assessments and audits to identify and address potential weaknesses in systems.
Patching and Updates
- Apply patches provided by SQLite to fix the use-after-free vulnerability.