Mathias Krause discovered an information leak in the Linux kernel's UDF file system implementation. A local user could exploit this flaw to examine some of the kernel's heap memory. (CVE-2012-6548)

Mathias Krause discovered an information leak in the Linux kernel's ISO 9660 CDROM file system driver. A local user could exploit this flaw to examine some of the kernel's heap memory. (CVE-2012-6549)

An integer overflow was discovered in the Direct Rendering Manager (DRM) subsystem for the i915 video driver in the Linux kernel. A local user could exploit this flaw to cause a denial of service (crash) or potentially escalate privileges. (CVE-2013-0913)

Andrew Honig discovered a flaw in guest OS time updates in the Linux kernel's KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to cause a denial of service (crash host system) or potential escalate privilege to the host kernel level.
(CVE-2013-1796)

Andrew Honig discovered a use after free error in guest OS time updates in the Linux kernel;s KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to escalate privilege to the host kernel level. (CVE-2013-1797)

Andrew Honig reported a flaw in the way KVM (Kernel-based Virtual Machine) emulated the IOAPIC. A privileged guest user could exploit this flaw to read host memory or cause a denial of service (crash the host). (CVE-2013-1798)

A format-string bug was discovered in the Linux kernel's ext3 filesystem driver. A local user could exploit this flaw to possibly escalate privileges on the system. (CVE-2013-1848)

A buffer overflow was discovered in the Linux Kernel's USB subsystem for devices reporting the cdc-wdm class. A specially crafted USB device when plugged-in could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2013-1860)

An information leak in the Linux kernel's dcb netlink interface was discovered. A local user could obtain sensitive information by examining kernel stack memory. (CVE-2013-2634)

A kernel stack information leak was discovered in the RTNETLINK component of the Linux kernel. A local user could read sensitive information from the kernel stack. (CVE-2013-2635).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The openSUSE 12.1 kernel was updated to fix a severe secrutiy issue and various bugs.

Security issues fixed: CVE-2013-2094: The perf_swevent_init function in kernel/events/core.c in the Linux kernel used an incorrect integer data type, which allowed local users to gain privileges via a crafted perf_event_open system call.

CVE-2013-1774: The chase_port function in drivers/usb/serial/io_ti.c in the Linux kernel allowed local users to cause a denial of service (NULL pointer dereference and system crash) via an attempted /dev/ttyUSB read or write operation on a disconnected Edgeport USB serial converter.

CVE-2013-1928: The do_video_set_spu_palette function in fs/compat_ioctl.c in the Linux kernel lacked a certain error check, which might have allowed local users to obtain sensitive information from kernel stack memory via a crafted VIDEO_SET_SPU_PALETTE ioctl call on a /dev/dvb device.

CVE-2013-1796: The kvm_set_msr_common function in arch/x86/kvm/x86.c in the Linux kernel did not ensure a required time_page alignment during an MSR_KVM_SYSTEM_TIME operation, which allowed guest OS users to cause a denial of service (buffer overflow and host OS memory corruption) or possibly have unspecified other impact via a crafted application.

CVE-2013-1797: Use-after-free vulnerability in arch/x86/kvm/x86.c in the Linux kernel allowed guest OS users to cause a denial of service (host OS memory corruption) or possibly have unspecified other impact via a crafted application that triggers use of a guest physical address (GPA) in (1) movable or (2) removable memory during an MSR_KVM_SYSTEM_TIME kvm_set_msr_common operation.

CVE-2013-1798: The ioapic_read_indirect function in virt/kvm/ioapic.c in the Linux kernel did not properly handle a certain combination of invalid IOAPIC_REG_SELECT and IOAPIC_REG_WINDOW operations, which allowed guest OS users to obtain sensitive information from host OS memory or cause a denial of service (host OS OOPS) via a crafted application.

CVE-2013-1767: Use-after-free vulnerability in the shmem_remount_fs function in mm/shmem.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (system crash) by remounting a tmpfs filesystem without specifying a required mpol (aka mempolicy) mount option.

CVE-2013-0913: Integer overflow in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the i915 driver in the Direct Rendering Manager (DRM) subsystem in the Linux kernel allowed local users to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted application that triggers many relocation copies, and potentially leads to a race condition.

Bugs fixed :

  - qlge: fix dma map leak when the last chunk is not     allocated (bnc#819519).

  - TTY: fix atime/mtime regression (bnc#815745).

  - fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error     check (bnc#813735).

  - USB: io_ti: Fix NULL dereference in chase_port()     (bnc#806976, CVE-2013-1774).

  - KVM: Convert MSR_KVM_SYSTEM_TIME to use     gfn_to_hva_cache_init (bnc#806980 CVE-2013-1797).

  - KVM: Fix bounds checking in ioapic indirect register     read (bnc#806980 CVE-2013-1798).

  - KVM: Fix for buffer overflow in handling of     MSR_KVM_SYSTEM_TIME (bnc#806980 CVE-2013-1796).

  - kabi/severities: Allow kvm module abi changes - modules     are self consistent

  - loopdev: fix a deadlock (bnc#809748).

  - block: use i_size_write() in bd_set_size() (bnc#809748).

  - drm/i915: bounds check execbuffer relocation count     (bnc#808829,CVE-2013-0913).

  - tmpfs: fix use-after-free of mempolicy object     (bnc#806138, CVE-2013-1767).

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:0727 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for     Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for     the standard Red Hat Enterprise Linux kernel.

    A flaw was found in the way KVM handled guest time updates when the buffer     the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state     register (MSR) crossed a page boundary. A privileged guest user could use     this flaw to crash the host or, potentially, escalate their privileges,     allowing them to execute arbitrary code at the host kernel level.
    (CVE-2013-1796)

    A potential use-after-free flaw was found in the way KVM handled guest time     updates when the GPA (guest physical address) the guest registered by     writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) fell into a     movable or removable memory region of the hosting user-space process (by     default, QEMU-KVM) on the host. If that memory region is deregistered from     KVM using KVM_SET_USER_MEMORY_REGION and the allocated virtual memory     reused, a privileged guest user could potentially use this flaw to     escalate their privileges on the host. (CVE-2013-1797)

    A flaw was found in the way KVM emulated IOAPIC (I/O Advanced Programmable     Interrupt Controller). A missing validation check in the     ioapic_read_indirect() function could allow a privileged guest user to     crash the host, or read a substantial portion of host kernel memory.
    (CVE-2013-1798)

    Red Hat would like to thank Andrew Honig of Google for reporting all of     these issues.

    All users of kvm are advised to upgrade to these updated packages, which     contain backported patches to correct these issues. Note that the procedure     in the Solution section must be performed before this update will take     effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名稱	產品	系列	已發布	已更新	嚴重性
66302	Ubuntu 12.10 : linux vulnerabilities (USN-1813-1)	Nessus	Ubuntu Local Security Checks	2013/5/3	2019/9/19	high
75018	openSUSE Security Update : kernel (openSUSE-SU-2013:0847-1)	Nessus	SuSE Local Security Checks	2014/6/13	2022/9/16	high
65905	RHEL 5 : kvm (RHSA-2013:0727)	Nessus	Red Hat Local Security Checks	2013/4/10	2024/11/4	high

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