-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: samba security, bug fix, and enhancement update Advisory ID: RHSA-2017:2778-01 Product: Red Hat Gluster Storage Advisory URL: https://access.redhat.com/errata/RHSA-2017:2778 Issue date: 2017-09-21 CVE Names: CVE-2017-2619 CVE-2017-9461 ===================================================================== 1. Summary: An update for samba is now available for Red Hat Gluster Storage 3.3 for RHEL 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Gluster 3.3 Samba on RHEL-6 - noarch, x86_64 3. Description: Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es): * A race condition was found in samba server. A malicious samba client could use this flaw to access files and directories in areas of the server file system not exported under the share definitions. (CVE-2017-2619) * A flaw was found in the way Samba handled dangling symlinks. An authenticated malicious Samba client could use this flaw to cause the smbd daemon to enter an infinite loop and use an excessive amount of CPU and memory. (CVE-2017-9461) Red Hat would like to thank the Samba project for reporting CVE-2017-2619. Upstream acknowledges Jann Horn (Google) as the original reporter of CVE-2017-2619. Bug Fix(es): * In the samba configuration, by default the 'posix locking' is enabled and 'stat cache' is disabled. Enabling 'posix locking' sends the file lock request to the bricks too, and disabling 'stat cache' blocks samba to cache certain information at the samba layer. This led to decrease in performance of SMB access of Red Hat Gluster Storage volumes As a fix, the following two options are included in the samba configuration file: posix locking = No stat cache = Yes Due to this, a slight improvement in the performance is observed. (BZ#1436265) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the smb service will be restarted automatically. 5. Bugs fixed (https://bugzilla.redhat.com/): 1334397 - Samba [RHEL6] : Upon smbd crash the log displays core dump path as /var/log/samba/cores/smbd but in actual the core is dumped in /var/log/cores 1426663 - [RHEL6] Samba: Yum update for Samba will fail due to higher versions in RHEL 6 1429472 - CVE-2017-2619 samba: symlink race permits opening files outside share directory 1436265 - Smb.conf options for performance improvements [RHEL6] 1444028 - [SAMBA-RHEL6]Unable to start smbd in RHEL6 as /run/smbd.pid does not exist 1459464 - CVE-2017-9461 samba: fd_open_atomic infinite loop due to wrong handling of dangling symlinks 6. Package List: Red Hat Gluster 3.3 Samba on RHEL-6: Source: libldb-1.1.29-1.el6rhs.src.rpm libtalloc-2.1.9-1.el6rhs.src.rpm libtdb-1.3.12-1.1.el6rhs.src.rpm libtevent-0.9.31-1.el6rhs.src.rpm samba-4.6.3-5.el6rhs.src.rpm noarch: samba-common-4.6.3-5.el6rhs.noarch.rpm samba-pidl-4.6.3-5.el6rhs.noarch.rpm x86_64: ctdb-4.6.3-5.el6rhs.x86_64.rpm ctdb-tests-4.6.3-5.el6rhs.x86_64.rpm ldb-tools-1.1.29-1.el6rhs.x86_64.rpm libldb-1.1.29-1.el6rhs.x86_64.rpm libldb-debuginfo-1.1.29-1.el6rhs.x86_64.rpm libldb-devel-1.1.29-1.el6rhs.x86_64.rpm libsmbclient-4.6.3-5.el6rhs.x86_64.rpm libsmbclient-devel-4.6.3-5.el6rhs.x86_64.rpm libtalloc-2.1.9-1.el6rhs.x86_64.rpm libtalloc-debuginfo-2.1.9-1.el6rhs.x86_64.rpm libtalloc-devel-2.1.9-1.el6rhs.x86_64.rpm libtdb-1.3.12-1.1.el6rhs.x86_64.rpm libtdb-debuginfo-1.3.12-1.1.el6rhs.x86_64.rpm libtdb-devel-1.3.12-1.1.el6rhs.x86_64.rpm libtevent-0.9.31-1.el6rhs.x86_64.rpm libtevent-debuginfo-0.9.31-1.el6rhs.x86_64.rpm libtevent-devel-0.9.31-1.el6rhs.x86_64.rpm libwbclient-4.6.3-5.el6rhs.x86_64.rpm libwbclient-devel-4.6.3-5.el6rhs.x86_64.rpm pyldb-1.1.29-1.el6rhs.x86_64.rpm pyldb-devel-1.1.29-1.el6rhs.x86_64.rpm pytalloc-2.1.9-1.el6rhs.x86_64.rpm pytalloc-devel-2.1.9-1.el6rhs.x86_64.rpm python-tdb-1.3.12-1.1.el6rhs.x86_64.rpm python-tevent-0.9.31-1.el6rhs.x86_64.rpm samba-4.6.3-5.el6rhs.x86_64.rpm samba-client-4.6.3-5.el6rhs.x86_64.rpm samba-client-libs-4.6.3-5.el6rhs.x86_64.rpm samba-common-libs-4.6.3-5.el6rhs.x86_64.rpm samba-common-tools-4.6.3-5.el6rhs.x86_64.rpm samba-dc-4.6.3-5.el6rhs.x86_64.rpm samba-dc-libs-4.6.3-5.el6rhs.x86_64.rpm samba-debuginfo-4.6.3-5.el6rhs.x86_64.rpm samba-devel-4.6.3-5.el6rhs.x86_64.rpm samba-krb5-printing-4.6.3-5.el6rhs.x86_64.rpm samba-libs-4.6.3-5.el6rhs.x86_64.rpm samba-python-4.6.3-5.el6rhs.x86_64.rpm samba-test-4.6.3-5.el6rhs.x86_64.rpm samba-test-libs-4.6.3-5.el6rhs.x86_64.rpm samba-vfs-glusterfs-4.6.3-5.el6rhs.x86_64.rpm samba-winbind-4.6.3-5.el6rhs.x86_64.rpm samba-winbind-clients-4.6.3-5.el6rhs.x86_64.rpm samba-winbind-krb5-locator-4.6.3-5.el6rhs.x86_64.rpm samba-winbind-modules-4.6.3-5.el6rhs.x86_64.rpm tdb-tools-1.3.12-1.1.el6rhs.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2017-2619 https://access.redhat.com/security/cve/CVE-2017-9461 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZw0QPXlSAg2UNWIIRAr5wAJ4phoib6er4/mBNHnDXhtlb8FPmaACgvxe3 VOZzdVEnK72kEtUqqWQ4O2I= =LGa8 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce