-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: rhev-hypervisor security, bug fix and enhancement update Advisory ID: RHSA-2016:0379-01 Product: Red Hat Enterprise Virtualization Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0379.html Issue date: 2016-03-09 CVE Names: CVE-2015-3197 CVE-2016-0702 CVE-2016-0705 CVE-2016-0797 CVE-2016-0800 ===================================================================== 1. Summary: An updated rhev-hypervisor package that fixes several security issues, bugs, and enhancements is now available. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: RHEL 7-based RHEV-H - noarch RHEV Hypervisor for RHEL-6 - noarch 3. Description: The rhev-hypervisor package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: a subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A padding oracle flaw was found in the Secure Sockets Layer version 2.0 (SSLv2) protocol. An attacker could potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections. This cross-protocol attack is publicly referred to as DROWN. (CVE-2016-0800) Note: This issue was addressed by disabling the SSLv2 protocol by default when using the 'SSLv23' connection methods, and removing support for weak SSLv2 cipher suites. For more information, refer to the knowledge base article linked in the References section. A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197) A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys. (CVE-2016-0702) A double-free flaw was found in the way OpenSSL parsed certain malformed DSA (Digital Signature Algorithm) private keys. An attacker could create specially crafted DSA private keys that, when processed by an application compiled against OpenSSL, could cause the application to crash. (CVE-2016-0705) An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. (CVE-2016-0797) Red Hat would like to thank the OpenSSL project for reporting these issues. Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original reporters of CVE-2016-0800 and CVE-2015-3197; Yuval Yarom (University of Adelaide and NICTA), Daniel Genkin (Technion and Tel Aviv University), Nadia Heninger (University of Pennsylvania) as the original reporters of CVE-2016-0702; Adam Langley (Google/ BoringSSL) as the original reporter of CVE-2016-0705; and Guido Vranken as the original reporter of CVE-2016-0797. All openssl users are advised to upgrade to this updated package, which contain backported patches to correct these issues. For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted. Changes to the rhev-hypervisor component: * Previously, a race between services during boot prevented network configuration from upgrading correctly. The risk for the race has now been reduced significantly to allow the upgrade of the network configuration to complete correctly. (BZ#1194068) * Previously, using the text user interface (TUI) to log in to the administrator account of Red Hat Enterprise Virtualization Hypervisor failed with a Python backtrace. This update makes the "six" module correctly importable under all circumstances, which ensures that logging in to Red Hat Enterprise Virtualization Hypervisor using TUI proceeds as expected. (BZ#1246836) 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1194068 - vdsm-3.5 network conf upgrade fails, due to `service network restart` by node 1236508 - [Tracker] Build RHEV-H for RHEV 3.6.0 1283498 - messages log flooded with 'Failed to reset devices.list on /machine.slice: Invalid argument' 1301846 - CVE-2015-3197 OpenSSL: SSLv2 doesn't block disabled ciphers 1302248 - RHEV-H 7.2 RC1: Remove "Beta" keyword from plymouth 1310593 - CVE-2016-0800 SSL/TLS: Cross-protocol attack on TLS using SSLv2 (DROWN) 1310596 - CVE-2016-0705 OpenSSL: Double-free in DSA code 1310599 - CVE-2016-0702 OpenSSL: Side channel attack on modular exponentiation 1311880 - CVE-2016-0797 OpenSSL: BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption 6. Package List: RHEV Hypervisor for RHEL-6: Source: rhev-hypervisor7-7.2-20160302.1.el6ev.src.rpm noarch: rhev-hypervisor7-7.2-20160302.1.el6ev.noarch.rpm RHEL 7-based RHEV-H: Source: rhev-hypervisor7-7.2-20160302.1.el7ev.src.rpm noarch: rhev-hypervisor7-7.2-20160302.1.el7ev.noarch.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-2015-3197 https://access.redhat.com/security/cve/CVE-2016-0702 https://access.redhat.com/security/cve/CVE-2016-0705 https://access.redhat.com/security/cve/CVE-2016-0797 https://access.redhat.com/security/cve/CVE-2016-0800 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFW4IfAXlSAg2UNWIIRAgaiAKCQlEpIKJL+rK2f6UPMIv3Il7auFwCeJGN7 mfmj2QzK8g9tbsBF/DO6Tgg= =+FGH -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce