CVE-2017-5640

It was noticed that a malicious process impersonating an Impala daemon in Apache Impala ...

9.8 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.85%Up 1.0 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2017-5640
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-287
Updated: 2026-11-02

CVE List No score

Record: CVE-2017-5640
Updated: 2026-11-02

EUVDEUVD-2017-14732 No score

Record: EUVD-2017-14732
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pprr-66x6-xjr8 9.8

It was noticed that a malicious process impersonating an Impala daemon in Apache Impala ...

Record: GHSA-pprr-66x6-xjr8
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-287
Updated: 2026-11-02

OSV 9.8

Record: CVE-2017-5640
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5640 is a critical vulnerability (CVSS 9.8) in Apache Impala, published July 10, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.85%, the 86th percentile. No source names a fixed version.