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Date: Thu, 24 Jan 2019 13:34:21 +0900
From: Akira Ajisaka <aajisaka@...che.org>
To: general@...oop.apache.org, user@...oop.apache.org,
"<security@...oop.apache.org>" <security@...oop.apache.org>, oss-security@...ts.openwall.com
Subject: CVE-2018-1296: Apache Hadoop HDFS Permissive listXAttr Authorization
CVE-2018-1296: Apache Hadoop HDFS Permissive listXAttr Authorization
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
3.0.0-alpha1 to 3.0.0, 2.9.0, 2.8.0 to 2.8.3, 2.5.0 to 2.7.5
Description:
HDFS exposes extended attribute key/value pairs during listXAttrs,
verifying only path-level search access to the directory rather than
path-level read permission to the referent. This affects features that
store sensitive data in extended attributes, such as HDFS encryption secrets.
Mitigation:
If a file contains sensitive data in extended attributes, users and admins
need to change the permission to prevent others from listing the directory
which contains the file.
Credit:
This issue was discovered by Rushabh Shah.
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