CVE-2018-18021 (GCVE-0-2018-18021)

Vulnerability from cvelistv5 – Published: 2018-10-07 06:00 – Updated: 2024-08-05 11:01
VLAI
Summary
arch/arm64/kvm/guest.c in KVM in the Linux kernel before 4.18.12 on the arm64 platform mishandles the KVM_SET_ON_REG ioctl. This is exploitable by attackers who can create virtual machines. An attacker can arbitrarily redirect the hypervisor flow of control (with full register control). An attacker can also cause a denial of service (hypervisor panic) via an illegal exception return. This occurs because of insufficient restrictions on userspace access to the core register file, and because PSTATE.M validation does not prevent unintended execution modes.
Severity
7.1 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • n/a
Assigner
References
Date Public
2018-10-07 00:00
Show details on NVD website
To clipboard 

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      "product_status:fixed": "26",
      "product_status:known_not_affected": "103",
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      "status": "final",
      "title": "kernel: Privilege escalation on arm64 via KVM hypervisor",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-18021.json",
      "version": "3"
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}



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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.