Описание
Security update for the Linux Kernel
The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes.
The following security bugs were fixed:
- CVE-2018-1087: And an unprivileged KVM guest user could use this flaw to potentially escalate their privileges inside a guest. (bsc#1087088)
- CVE-2018-8897: An unprivileged system user could use incorrect set up interrupt stacks to crash the Linux kernel resulting in DoS issue. (bsc#1087088)
- CVE-2018-10124: The kill_something_info function in kernel/signal.c in the Linux kernel before 4.13, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service via an INT_MIN argument (bnc#1089752).
The following non-security bugs were fixed:
- kvm/x86: fix icebp instruction handling (bsc#1087088).
- media: cpia2: Fix a couple off by one bugs (bsc#1050431).
- nfs: add nostatflush mount option (bsc#1065726).
- nfs: allow flush-on-stat to be disabled (bsc#1065726).
- powerpc/fadump: Add a warning when 'fadump_reserve_mem=' is used (bnc#1032084, FATE#323225).
- powerpc/fadump: reuse crashkernel parameter for fadump memory reservation (bnc#1032084, FATE#323225).
- powerpc/fadump: update documentation about crashkernel parameter reuse (bnc#1032084, FATE#323225).
- powerpc/fadump: use 'fadump_reserve_mem=' when specified (bnc#1032084, FATE#323225).
- x86/entry/64: Do not use IST entry for #BP stack (bsc#1087088).
Список пакетов
SUSE Linux Enterprise Server 11 SP4
SUSE Linux Enterprise Server for SAP Applications 11 SP4
SUSE Linux Enterprise Software Development Kit 11 SP4
Ссылки
- Link for SUSE-SU-2018:1171-1
- E-Mail link for SUSE-SU-2018:1171-1
- SUSE Security Ratings
- SUSE Bug 1032084
- SUSE Bug 1050431
- SUSE Bug 1065726
- SUSE Bug 1087088
- SUSE Bug 1089665
- SUSE Bug 1089668
- SUSE Bug 1089752
- SUSE CVE CVE-2018-10124 page
- SUSE CVE CVE-2018-1087 page
- SUSE CVE CVE-2018-8897 page
Описание
The kill_something_info function in kernel/signal.c in the Linux kernel before 4.13, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service via an INT_MIN argument.
Затронутые продукты
Ссылки
- CVE-2018-10124
- SUSE Bug 1087082
- SUSE Bug 1089752
- SUSE Bug 1091815
Описание
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
Затронутые продукты
Ссылки
- CVE-2018-1087
- SUSE Bug 1087088
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
Ссылки
- CVE-2018-8897
- SUSE Bug 1087078
- SUSE Bug 1087088
- SUSE Bug 1090368
- SUSE Bug 1090820
- SUSE Bug 1090869
- SUSE Bug 1092497
- SUSE Bug 1093522
- SUSE Bug 1093524
- SUSE Bug 1098813
- SUSE Bug 1100835
- SUSE Bug 1115893
- SUSE Bug 1178658