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cve[email protected]CVE-2018-1087
HistoryMay 15, 2018 - 4:29 p.m.

CVE-2018-1087

2018-05-1516:29:00
CWE-250
web.nvd.nist.gov
237
cve-2018-1087
kernel kvm
linux kernel
vulnerability
privilege escalation
nvd

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS3

8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

28.1%

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.

Affected configurations

Vulners
NVD
Node
kernellinux_kernelRange4.16
OR
kernellinux_kernelRange4.16
OR
kernellinux_kernelRange4.17
OR
kernellinux_kernelRange4.17
OR
kernellinux_kernelRange4.17
VendorProductVersionCPE
kernellinux_kernel*cpe:2.3:a:kernel:linux_kernel:*:*:*:*:*:*:*:*
kernellinux_kernel*cpe:2.3:a:kernel:linux_kernel:*:*:*:*:*:*:*:*
kernellinux_kernel*cpe:2.3:a:kernel:linux_kernel:*:*:*:*:*:*:*:*
kernellinux_kernel*cpe:2.3:a:kernel:linux_kernel:*:*:*:*:*:*:*:*
kernellinux_kernel*cpe:2.3:a:kernel:linux_kernel:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "KVM",
    "vendor": "kernel",
    "versions": [
      {
        "status": "affected",
        "version": "kernel 4.16"
      },
      {
        "status": "affected",
        "version": "kernel 4.16-rc7"
      },
      {
        "status": "affected",
        "version": "kernel 4.17-rc1"
      },
      {
        "status": "affected",
        "version": "kernel 4.17-rc2"
      },
      {
        "status": "affected",
        "version": "kernel 4.17-rc3"
      }
    ]
  }
]

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS3

8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

28.1%