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Apache Impala 2.8.0 Authentication Bypass

Apache Impala 2.8.0 Authentication Bypass
Posted Jul 10, 2017
Authored by Cloudera

Apache Impala versions 2.7.0 through 2.8.0 suffers from an information disclosure vulnerability. It was noticed that a malicious process impersonating an Impala daemon 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.

tags | advisory, info disclosure
advisories | CVE-2017-5640
MD5 | b530e7bbb86b2191fd3c6186258dd8ec

Apache Impala 2.8.0 Authentication Bypass

Change Mirror Download
CVE-2017-5640 Apache Impala (incubating) Information Disclosure

Severity: High

Versions Affected:
Apache Impala (incubating) 2.7.0 to 2.8.0

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

Mitigation:
Users of the affected versions should apply the following mitigation:
Upgrade to Apache Impala (incubating) 2.9.0

Credit:
This issue was identified by the Cloudera Security team.

References:
https://issues.apache.org/jira/browse/IMPALA-5005

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