From bugzilla at redhat.com Wed Oct 26 17:25:18 2011 From: bugzilla at redhat.com (bugzilla at redhat.com) Date: Wed, 26 Oct 2011 17:25:18 +0000 Subject: [RHSA-2011:1408-01] Moderate: rhev-hypervisor security update Message-ID: <201110261725.p9QHPIvf006939@int-mx12.intmail.prod.int.phx2.redhat.com> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: rhev-hypervisor security update Advisory ID: RHSA-2011:1408-01 Product: Red Hat Enterprise Virtualization Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1408.html Issue date: 2011-10-26 CVE Names: CVE-2011-2723 CVE-2011-2942 CVE-2011-3188 CVE-2011-3347 ===================================================================== 1. Summary: An updated rhev-hypervisor package that fixes several security issues is now available. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: RHEV Hypervisor for RHEL-5 - 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. The RHBA-2011:1254 update introduced a regression in the Linux kernel's Ethernet bridge implementation. If a system had an interface in a bridge, and an attacker on the local network could send packets to that interface, they could cause a denial of service on that system. (CVE-2011-2942) A flaw in the Linux kernel could lead to GRO (Generic Receive Offload) fields being left in an inconsistent state. An attacker on the local network could use this flaw to trigger a denial of service. GRO is enabled by default in all network drivers that support it. (CVE-2011-2723) The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were generated could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence numbers and fragment IDs are now more random. (CVE-2011-3188) Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service. (CVE-2011-3347) Red Hat would like to thank Brent Meshier for reporting CVE-2011-2723; Dan Kaminsky for reporting CVE-2011-3188; and Somnath Kotur for reporting CVE-2011-3347. This updated package provides updated components that include fixes for numerous security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers: CVE-2011-2695, CVE-2011-2699, CVE-2011-3191, CVE-2011-1833, CVE-2011-2496, CVE-2011-3209, CVE-2011-2484, CVE-2011-3131, CVE-2009-4067, CVE-2011-1160, and CVE-2011-1585 (kernel issues) CVE-2011-3378 (rpm issues) Users of Red Hat Enterprise Virtualization Hypervisor should upgrade to this updated package, which resolves these issues. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 726552 - CVE-2011-2723 kernel: gro: only reset frag0 when skb can be pulled 730917 - CVE-2011-2942 kernel: bridge: null pointer dereference in __br_deliver 732658 - CVE-2011-3188 kernel: net: improve sequence number generation 736425 - CVE-2011-3347 kernel: be2net: promiscuous mode and non-member VLAN packets DoS 6. Package List: RHEV Hypervisor for RHEL-5: noarch: rhev-hypervisor-5.7-20111018.1.el5_7.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/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-2723.html https://www.redhat.com/security/data/cve/CVE-2011-2942.html https://www.redhat.com/security/data/cve/CVE-2011-3188.html https://www.redhat.com/security/data/cve/CVE-2011-3347.html https://access.redhat.com/security/updates/classification/#moderate https://rhn.redhat.com/errata/RHBA-2011-1254.html 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFOqEJqXlSAg2UNWIIRAklfAJ4/CAe4xb1UCpuB6a1L1QSnwbGAbgCfQd9g FcmqqjxbdN5SYNy7DNT8O9c= =WUu6 -----END PGP SIGNATURE-----