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SUSE-SU-2018:3230-1

Опубликовано: 18 окт. 2018
Источник: suse-cvrf

Описание

Security update for xen

This update for xen fixes several issues.

These security issues were fixed:

  • CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820)
  • Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822)
  • Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823)
  • CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152).
  • CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635).

These non-security issues were fixed:

  • bsc#1086039: Ensure that Dom0 does represent DomU cpu flags correctly
  • bsc#1027519: Fixed shadow mode guests

Список пакетов

SUSE Linux Enterprise Server 12 SP2-BCL
xen-4.7.5_02-43.30.1
xen-doc-html-4.7.5_02-43.30.1
xen-libs-4.7.5_02-43.30.1
xen-libs-32bit-4.7.5_02-43.30.1
xen-tools-4.7.5_02-43.30.1
xen-tools-domU-4.7.5_02-43.30.1

Ссылки

Описание

Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.

Затронутые продукты
SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.5_02-43.30.1
Ссылки

Описание

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.

Затронутые продукты
SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.5_02-43.30.1
Ссылки

Описание

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.

Затронутые продукты
SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.5_02-43.30.1
Ссылки

Описание

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.

Затронутые продукты
SUSE Linux Enterprise Server 12 SP2-BCL:xen-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-4.7.5_02-43.30.1
SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-4.7.5_02-43.30.1
Ссылки
Уязвимость SUSE-SU-2018:3230-1