ID de Prueba:	1.3.6.1.4.1.25623.1.0.71936
Categoría:	Red Hat Local Security Checks
Título:	RedHat Security Advisory RHSA-2012:1042
Resumen:	NOSUMMARY
Descripción:	Description: The remote host is missing updates announced in advisory RHSA-2012:1042. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues: * A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. (CVE-2012-0044, Important) * It was found that the kvm_vm_ioctl_assign_device() function in the KVM (Kernel-based Virtual Machine) subsystem of a Linux kernel did not check if the user requesting device assignment was privileged or not. A local, unprivileged user on the host could assign unused PCI devices, or even devices that were in use and whose resources were not properly claimed by the respective drivers, which could result in the host crashing. (CVE-2011-4347, Moderate) * A flaw was found in the way the Linux kernel's XFS file system implementation handled on-disk Access Control Lists (ACLs). A local, unprivileged user could use this flaw to cause a denial of service or escalate their privileges by mounting a specially-crafted disk. (CVE-2012-0038, Moderate) * It was found that the Linux kernel's register set (regset) common infrastructure implementation did not check if the required get and set handlers were initialized. A local, unprivileged user could use this flaw to cause a denial of service by performing a register set operation with a ptrace() PTRACE_SETREGSET or PTRACE_GETREGSET request. (CVE-2012-1097, Moderate) * A race condition was found in the Linux kernel's memory management subsystem in the way pmd_none_or_clear_bad(), when called with mmap_sem in read mode, and Transparent Huge Pages (THP) page faults interacted. A privileged user in a KVM guest with the ballooning functionality enabled could potentially use this flaw to crash the host. A local, unprivileged user could use this flaw to crash the system. (CVE-2012-1179, Moderate) Red Hat would like to thank Chen Haogang for reporting CVE-2012-0044 Sasha Levin for reporting CVE-2011-4347 Wang Xi for reporting CVE-2012-0038 and H. Peter Anvin for reporting CVE-2012-1097. This update also fixes the following bugs: * When a RoCE (RDMA over Converged Ethernet) adapter with active RoCE communications was taken down suddenly (either by adapter failure or the intentional shutdown of the interface), the ongoing RoCE communications could cause the kernel to panic and render the machine unusable. A patch has been provided to protect the kernel in this situation and to pass an error up to the application still using the interface after it has been taken down instead. (BZ#799944) * The fix for Red Hat Bugzilla bug 713494, released via RHSA-2011:0928, introduced a regression. Attempting to change the state of certain features, such as GRO (Generic Receive Offload) or TSO (TCP segment offloading), for a 10 Gigabit Ethernet card that is being used in a virtual LAN (VLAN) resulted in a kernel panic. (BZ#816974) * If a new file was created on a Network File System version 4 (NFSv4) share, the ownership was set to nfsnobody (-2) until it was possible to upcall to the idmapper. As a consequence, subsequent file system operations could incorrectly use -2 for the user and group IDs for the given file, causing certain operations to fail. In reported cases, this issue also caused Viminfo file is not writable errors for users running Vim with files on an NFSv4 share. (BZ#820960) Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect. Solution: Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date http://rhn.redhat.com/errata/RHSA-2012-1042.html Risk factor : High
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2011-4347 [oss-security] 20111124 Re: CVE request -- kernel: kvm: device assignment DoS http://www.openwall.com/lists/oss-security/2011/11/24/7 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.10 https://bugzilla.redhat.com/show_bug.cgi?id=756084 https://github.com/torvalds/linux/commit/c4e7f9022e506c6635a5037713c37118e23193e4 Common Vulnerability Exposure (CVE) ID: CVE-2012-0038 [oss-security] 20120110 Re: CVE request: kernel: xfs heap overflow http://www.openwall.com/lists/oss-security/2012/01/10/11 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=093019cf1b18dd31b2c3b77acce4e000e2cbc9ce http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.9 https://bugzilla.redhat.com/show_bug.cgi?id=773280 https://github.com/torvalds/linux/commit/093019cf1b18dd31b2c3b77acce4e000e2cbc9ce https://github.com/torvalds/linux/commit/fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba Common Vulnerability Exposure (CVE) ID: CVE-2012-0044 51371 http://www.securityfocus.com/bid/51371 RHSA-2012:0743 http://rhn.redhat.com/errata/RHSA-2012-0743.html USN-1555-1 http://www.ubuntu.com/usn/USN-1555-1 USN-1556-1 http://www.ubuntu.com/usn/USN-1556-1 [oss-security] 20120111 Re: CVE request - kernel: drm: integer overflow in drm_mode_dirtyfb_ioctl() http://www.openwall.com/lists/oss-security/2012/01/12/1 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a5cd335165e31db9dbab636fd29895d41da55dd2 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.5 https://bugzilla.redhat.com/show_bug.cgi?id=772894 https://github.com/torvalds/linux/commit/a5cd335165e31db9dbab636fd29895d41da55dd2 Common Vulnerability Exposure (CVE) ID: CVE-2012-1097 48842 http://secunia.com/advisories/48842 48898 http://secunia.com/advisories/48898 48964 http://secunia.com/advisories/48964 RHSA-2012:0481 http://rhn.redhat.com/errata/RHSA-2012-0481.html RHSA-2012:0531 http://rhn.redhat.com/errata/RHSA-2012-0531.html SUSE-SU-2012:0554 http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html SUSE-SU-2012:0616 http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html [oss-security] 20120305 CVE-2012-1097 kernel: regset: Prevent null pointer reference on readonly regsets http://www.openwall.com/lists/oss-security/2012/03/05/1 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c8e252586f8d5de906385d8cf6385fee289a825e http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10 https://bugzilla.redhat.com/show_bug.cgi?id=799209 https://github.com/torvalds/linux/commit/c8e252586f8d5de906385d8cf6385fee289a825e Common Vulnerability Exposure (CVE) ID: CVE-2012-1179 1027084 http://www.securitytracker.com/id?1027084 48404 http://secunia.com/advisories/48404 FEDORA-2012-3712 http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html HPSBGN02970 http://marc.info/?l=bugtraq&m=139447903326211&w=2 [oss-security] 20120315 CVE-2012-1179 kernel: thp: __split_huge_page() mapcount != page_mapcount BUG_ON() http://www.openwall.com/lists/oss-security/2012/03/15/7 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1 https://bugzilla.redhat.com/show_bug.cgi?id=803793 https://github.com/torvalds/linux/commit/4a1d704194a441bf83c636004a479e01360ec850
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