CVE-2018-1087— Linux kernel KVM 权限许可和访问控制问题漏洞

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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.

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带着不必要的权限执行

Linux kernel KVM 权限许可和访问控制问题漏洞

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。KVM是其中的一个基于内核的虚拟机。 Linux kernel的KVM中存在权限许可和访问控制问题漏洞，该漏洞源于KVM没有正确处理异常。攻击者可利用该漏洞造成guest主机崩溃或提升权限。以下版本受到影响：Kernel 4.16版本，4.16-rc7版本，4.17-rc1版本，4.17-rc2版本，4.17-rc3版本。

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