CVE-2017-5640

Name: CVE-2017-5640
Creator: NVD / NIST
Published: 2017-07-10T20:29:00.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.85%

Last modified Jun 17, 2026

CVE-2017-5640 is a vulnerability of currently unknown severity. It was noticed that a malicious process impersonating an Impala daemon in Apache Impala (incubating) 2.7.0 to 2.8.0 could cause Impala daemons to skip authentication checks when Kerberos is enabled (but TLS is not). If the malicious server responds with 'COMPLETE' before the SASL handshake has completed, the client will consider the handshake as completed even though no exchange of credentials has happened.. EPSS estimates a 2.85% chance of exploitation in the next 30 days.

Description

It was noticed that a malicious process impersonating an Impala daemon in Apache Impala (incubating) 2.7.0 to 2.8.0 could cause Impala daemons to skip authentication checks when Kerberos is enabled (but TLS is not). If the malicious server responds with 'COMPLETE' before the SASL handshake has completed, the client will consider the handshake as completed even though no exchange of credentials has happened.

Metrics

EPSS Probability

2.85%

84.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Apache	Impala	2.7.0
Apache	Impala	2.8.0

References

http://www.securityfocus.com/bid/99508Third Party Advisory, VDB Entry
https://lists.apache.org/thread.html/c02e83aa46c90b7cbc87dd649cf8f9b73e11053eddea9144a397da53%40%3Cdev.impala.apache.org%3E
http://www.securityfocus.com/bid/99508Third Party Advisory, VDB Entry
https://lists.apache.org/thread.html/c02e83aa46c90b7cbc87dd649cf8f9b73e11053eddea9144a397da53%40%3Cdev.impala.apache.org%3E

Timeline

Published: Jul 10, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5640?

How severe is CVE-2017-5640?

Severity scoring for CVE-2017-5640 is pending analysis. The EPSS model estimates a 2.85% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5640?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-5640?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST