CVE-2017-5640 : What You Need to Know
Learn about CVE-2017-5640 affecting Apache Impala versions 2.7.0 to 2.8.0. Understand the impact, technical details, and mitigation steps for this information disclosure vulnerability.
Apache Impala (incubating) versions 2.7.0 to 2.8.0 have a vulnerability that could allow a malicious procedure to bypass authentication checks when Kerberos is enabled but TLS is not.
Understanding CVE-2017-5640
This CVE involves a security issue in Apache Impala (incubating) versions 2.7.0 to 2.8.0 that could lead to information disclosure.
What is CVE-2017-5640?
A malicious procedure can impersonate an Impala daemon in Apache Impala, potentially bypassing authentication checks when Kerberos is enabled without TLS. This can mislead clients into assuming completion of the handshake without proper credential exchange.
The Impact of CVE-2017-5640
The vulnerability could result in information disclosure, allowing unauthorized access to sensitive data processed by Impala daemons.
Technical Details of CVE-2017-5640
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability allows a fake Impala daemon to trick clients into assuming authentication completion without proper credential exchange, potentially leading to unauthorized access.
Affected Systems and Versions
- Product: Apache Impala
- Vendor: Apache Software Foundation
- Versions Affected: 2.7.0 to 2.8.0 incubating
Exploitation Mechanism
The exploit involves a fake server sending a 'COMPLETE' response prematurely, causing clients to incorrectly believe that the SASL handshake has been completed.
Mitigation and Prevention
Protecting systems from CVE-2017-5640 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Impala to a patched version that addresses the vulnerability.
- Implement proper TLS configurations to prevent unauthorized access.
Long-Term Security Practices
- Regularly monitor and audit Impala daemon activities for any suspicious behavior.
- Enforce strict authentication protocols to prevent unauthorized access.
Patching and Updates
- Apply security patches provided by Apache Software Foundation to fix the vulnerability and enhance system security.