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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1384 CVE-2015-1836: Apache HBase remote denial of service, information integrity, and information disclosure vulnerability 26 May 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Apache HBase Publisher: The Apache Software Foundation Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Access Privileged Data -- Existing Account Modify Arbitrary Files -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-1836 Original Bulletin: http://mail-archives.us.apache.org/mod_mbox/www-announce/201505.mbox/%3CCA+RK=_CFiTfQ2d0V+kuJx_y5izmYccaKjXaJ3V72KK7tbOhbkg@mail.gmail.com%3E - --------------------------BEGIN INCLUDED TEXT-------------------- CVE-2015-1836: Apache HBase remote denial of service, information integrity, and information disclosure vulnerability. Severity: Important Vendor: The Apache Software Foundation Versions Affected: HBase 0.98.0 - 0.98.12 HBase 1.0.0 - 1.0.1 HBase 1.1.0 The unsupported HBase 0.96 versions are also affected. Description: A logic error caused HBase in most secure configuration deployments to handle its coordination state in ZooKeeper via insecure ACLs. Anyone with remote unauthenticated network access to the ZooKeeper quorum, which by definition includes all HBase clients, can make use of this opening to degrade or completely stop availability. Any user with the authentication credentials needed to connect to the HBase cluster as a normal user can, in some configurations, read newly written HBase data that they are not authorized to see. We believe it is possible for any user with authentication credentials for the underlying HDFS cluster to write arbitrary HBase data. Work to confirm this last attack vector is ongoing and this announcement will be updated when we have more information. Mitigation: HBase users should update to the latest hotfix release of their respective version (e.g. 0.98.12.1, 1.0.1.1, 1.1.0.1) to ensure newly written coordination information has the correct ACLs. Any of these hotfix upgrades can be done via a zero downtime rolling upgrade[1]. Because this logic bug can mask some configuration errors, users are encouraged to verify their deployments prior to starting the upgrade process[2]. Once on an appropriate version, users *must* run through the following sequence of ZooKeeper commands via the ZooKeeper cli as the hbase service account. For more information on using the ZooKeeper cli in a secure set up, refer to the ZooKeeper documentation[3]. setAcl /hbase world:anyone:r,sasl:hbase:cdrwa setAcl /hbase/backup-masters sasl:hbase:cdrwa setAcl /hbase/draining sasl:hbase:cdrwa setAcl /hbase/flush-table-proc sasl:hbase:cdrwa setAcl /hbase/hbaseid world:anyone:r,sasl:hbase:cdrwa setAcl /hbase/master world:anyone:r,sasl:hbase:cdrwa setAcl /hbase/meta-region-server world:anyone:r,sasl:hbase:cdrwa setAcl /hbase/namespace sasl:hbase:cdrwa setAcl /hbase/online-snapshot sasl:hbase:cdrwa setAcl /hbase/region-in-transition sasl:hbase:cdrwa setAcl /hbase/recovering-regions sasl:hbase:cdrwa setAcl /hbase/replication sasl:hbase:cdrwa setAcl /hbase/rs sasl:hbase:cdrwa setAcl /hbase/running sasl:hbase:cdrwa setAcl /hbase/splitWAL sasl:hbase:cdrwa setAcl /hbase/table sasl:hbase:cdrwa setAcl /hbase/table-lock sasl:hbase:cdrwa setAcl /hbase/tokenauth sasl:hbase:cdrwa Credit: This issue was discovered by Paul Codding and Enis S=C3=B6ztutar. References: 1: http://hbase.apache.org/book.html#hbase.rolling.upgrade 2: http://hbase.apache.org/book.html#_external_zookeeper_configuration 3: http://s.apache.org/Rgo - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVWOwdBLndAQH1ShLAQLnew//VQ7fbSitq9fisljnK1+wjCpRA7QDfAhv h+F2O1gzmM166h9YFhTabZudCa0dT9/wMWjvWGDP+7YrVpkClgVXaQ7YbkXS5Qfz 4wzW0Z+c7U59rSZfiCng5kK2LL9ZFzFJnpsXvzB3ZYPWgwuCKiOC1jgeciPzVp3U VNRT3MdzgvaXE1fYyXS/5IvLjKAAVrmbIwPg/68bzx1pmCV93nlK+5496dftU4HX ByCRfDnV7cMGOsuKdMPwrDlaq84sTQEjYgjmKcPmy8QZVQqdFHCqvNOUTY9y8X14 AyS93Z7kE78wzeM9HT4Dowb99m7rm512TOiKHO8GokoodUJha5xCFn2wSdajMG1E Pv4G6/CvYqObiCFlwnICGE8zIw4VqqDIunh/ExTjImJEkBhBppu4ZhKtAyZ4bgde Sdrb2cCxu+v0d8BfvZL6VGdww9mFr2IqVIO3pgzP8/8rd/y0E1gnoSrj7jy3sUeX n64+F2osKYV8zDuoiWfzXR+Q3EPM1AUgXQ4hwA+SQwz0B4VkljnrF9R5qTh+27Oj MFUGWMqp1MFm8cP28VUc8mWTEYy8FOd7TDOYU577Sg34JlbttVeEydAA3yDFxnTy vVf3fzNFFNOaEU2goi0sjz5pAaPGVUStpKeg85Mp2IszAP5fejaTWsuQcE9KaTFS SEoLMnZTrAE= =e24X -----END PGP SIGNATURE-----