arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an "MMU potential stack buffer overrun."
Published 2017-10-11 15:29:00
Updated 2023-02-12 23:27:31
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: OverflowDirectory traversalExecute codeDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2017-12188

Probability of exploitation activity in the next 30 days: 0.06%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 25 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2017-12188

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.9
MEDIUM AV:L/AC:M/Au:N/C:C/I:C/A:C
3.4
10.0
NIST
7.8
HIGH CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
1.1
6.0
NIST

CWE ids for CVE-2017-12188

  • The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
    Assigned by: nvd@nist.gov (Secondary)
  • A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
    Assigned by: secalert@redhat.com (Primary)

References for CVE-2017-12188

Products affected by CVE-2017-12188

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