Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2018-1121)

The remote host is missing an update for the Huawei EulerOS 'kernel' package(s) announced via the EulerOS-SA-2018-1121 advisory.

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.CVE-2018-8897) On x86, MOV SS and POP SS behave strangely if they encounter a data breakpoint. If this occurs in a KVM guest, KVM incorrectly thinks that a #DB instruction was caused by the undocumented ICEBP instruction. This results in #DB being delivered to the guest kernel with an incorrect RIP on the stack. On most guest kernels, this will allow a guest user to DoS the guest kernel or even to escalate privilege to that of the guest kernel. (CVE-2018-1087)

'kernel' package(s) on Huawei EulerOS V2.0SP3.

Checks if a vulnerable package version is present on the target host.

Please install the updated package(s).