Issued:
2018-04-10
Updated:
2018-04-10

RHSA-2018:0676 - Important: kernel-rt security, bug fix, and enhancement update

Synopsis

Important: kernel-rt security, bug fix, and enhancement update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

  • kernel: Buffer overflow in firewire driver via crafted incoming packets (CVE-2016-8633, Important)

  • kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824, Important)

  • Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register (CVE-2017-12154, Important)

  • kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166, Important)

  • kernel: media: use-after-free in [tuner-xc2028] media driver (CVE-2016-7913, Moderate)

  • kernel: drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl() (CVE-2017-7294, Moderate)

  • kernel: Incorrect type conversion for size during dma allocation (CVE-2017-9725, Moderate)

  • kernel: memory leak when merging buffers in SCSI IO vectors (CVE-2017-12190, Moderate)

  • kernel: vfs: BUG in truncate_inode_pages_range() and fuse client (CVE-2017-15121, Moderate)

  • kernel: Use-after-free in userfaultfd_event_wait_completion function in userfaultfd.c (CVE-2017-15126, Moderate)

  • kernel: net: double-free and memory corruption in get_net_ns_by_id() (CVE-2017-15129, Moderate)

  • kernel: Use-after-free in snd_seq_ioctl_create_port() (CVE-2017-15265, Moderate)

  • kernel: Incorrect handling in arch/x86/include/asm/mmu_context.h:init_new_context function allowing use-after-free (CVE-2017-17053, Moderate)

  • kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to systemwide nfnl_cthelper_list structure (CVE-2017-17448, Moderate)

  • kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity (CVE-2017-17449, Moderate)

  • kernel: Unallocated memory access by malicious USB device via bNumInterfaces overflow (CVE-2017-17558, Moderate)

  • kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c (CVE-2017-18017, Moderate)

  • kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service (CVE-2017-18203, Moderate)

  • kernel: kvm: Reachable BUG() on out-of-bounds guest IRQ (CVE-2017-1000252, Moderate)

  • Kernel: KVM: DoS via write flood to I/O port 0x80 (CVE-2017-1000407, Moderate)

  • kernel: Stack information leak in the EFS element (CVE-2017-1000410, Moderate)

  • kernel: Kernel address information leak in drivers/acpi/sbshc.c:acpi_smbus_hc_add() function potentially allowing KASLR bypass (CVE-2018-5750, Moderate)

  • kernel: Race condition in sound system can lead to denial of service (CVE-2018-1000004, Moderate)

  • kernel: unlimiting the stack disables ASLR (CVE-2016-3672, Low)

  • kernel: Missing permission check in move_pages system call (CVE-2017-14140, Low)

  • kernel: Null pointer dereference in rngapi_reset function (CVE-2017-15116, Low)

  • kernel: Improper error handling of VM_SHARED hugetlbfs mapping in mm/hugetlb.c (CVE-2017-15127, Low)

  • kernel: Integer overflow in futex.c:futux_requeue can lead to denial of service or unspecified impact (CVE-2018-6927, Low)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank Eyal Itkin for reporting CVE-2016-8633; Mohamed Ghannam for reporting CVE-2017-8824; Jim Mattson (Google.com) for reporting CVE-2017-12154; Vitaly Mayatskih for reporting CVE-2017-12190; Andrea Arcangeli (Engineering) for reporting CVE-2017-15126; Kirill Tkhai for reporting CVE-2017-15129; Jan H. Schönherr (Amazon) for reporting CVE-2017-1000252; and Armis Labs for reporting CVE-2017-1000410. The CVE-2017-15121 issue was discovered by Miklos Szeredi (Red Hat) and the CVE-2017-15116 issue was discovered by ChunYu Wang (Red Hat).

Additional Changes:

See the Red Hat Enterprise Linux 7.5 Release Notes linked from References.

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

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Real Time7x86_64
Red Hat Enterprise Linux for Real Time for x86_64 - Extended Life Cycle Support7x86_64
Red Hat Enterprise Linux for Real Time for NFV7x86_64

Updated Packages

  • kernel-rt-devel-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debug-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debug-kvm-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debug-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-862.rt56.804.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-862.rt56.804.el7.noarch.rpm
  • kernel-rt-3.10.0-862.rt56.804.el7.src.rpm
  • kernel-rt-debuginfo-3.10.0-862.rt56.804.el7.x86_64.rpm

Fixes

CVEs

References

Additional information