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SUSE-SU-2017:3226-1

Опубликовано: 06 дек. 2017
Источник: suse-cvrf

Описание

Security update for the Linux Kernel

The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

  • CVE-2017-1000405: A bug in the THP CoW support could be used by local attackers to corrupt memory of other processes and cause them to crash (bnc#1069496).
  • CVE-2017-16939: The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages (bnc#1069702).

The following non-security bugs were fixed:

Fix a build issue on ppc64le systems (bsc#1070805)

Список пакетов

SUSE Linux Enterprise Desktop 12 SP2
kernel-default-4.4.90-92.50.1
kernel-default-devel-4.4.90-92.50.1
kernel-default-extra-4.4.90-92.50.1
kernel-devel-4.4.90-92.50.1
kernel-macros-4.4.90-92.50.1
kernel-source-4.4.90-92.50.1
kernel-syms-4.4.90-92.50.1
SUSE Linux Enterprise High Availability Extension 12 SP2
cluster-md-kmp-default-4.4.90-92.50.1
cluster-network-kmp-default-4.4.90-92.50.1
dlm-kmp-default-4.4.90-92.50.1
gfs2-kmp-default-4.4.90-92.50.1
ocfs2-kmp-default-4.4.90-92.50.1
SUSE Linux Enterprise Live Patching 12
kgraft-patch-4_4_90-92_50-default-1-4.1
SUSE Linux Enterprise Server 12 SP2
kernel-default-4.4.90-92.50.1
kernel-default-base-4.4.90-92.50.1
kernel-default-devel-4.4.90-92.50.1
kernel-default-man-4.4.90-92.50.1
kernel-devel-4.4.90-92.50.1
kernel-macros-4.4.90-92.50.1
kernel-source-4.4.90-92.50.1
kernel-syms-4.4.90-92.50.1
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2
kernel-default-4.4.90-92.50.1
kernel-default-base-4.4.90-92.50.1
kernel-default-devel-4.4.90-92.50.1
kernel-devel-4.4.90-92.50.1
kernel-macros-4.4.90-92.50.1
kernel-source-4.4.90-92.50.1
kernel-syms-4.4.90-92.50.1
SUSE Linux Enterprise Server for SAP Applications 12 SP2
kernel-default-4.4.90-92.50.1
kernel-default-base-4.4.90-92.50.1
kernel-default-devel-4.4.90-92.50.1
kernel-default-man-4.4.90-92.50.1
kernel-devel-4.4.90-92.50.1
kernel-macros-4.4.90-92.50.1
kernel-source-4.4.90-92.50.1
kernel-syms-4.4.90-92.50.1
SUSE Linux Enterprise Software Development Kit 12 SP2
kernel-docs-4.4.90-92.50.3
kernel-obs-build-4.4.90-92.50.1
SUSE Linux Enterprise Workstation Extension 12 SP2
kernel-default-extra-4.4.90-92.50.1

Ссылки

Описание

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original "Dirty cow" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp.

Затронутые продукты
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-devel-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-extra-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-devel-4.4.90-92.50.1
Ссылки

Описание

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

Затронутые продукты
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-devel-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-default-extra-4.4.90-92.50.1
SUSE Linux Enterprise Desktop 12 SP2:kernel-devel-4.4.90-92.50.1
Ссылки