GHSA-HWR9-P63P-WQ87

Vulnerability from github – Published: 2022-05-13 01:36 – Updated: 2022-05-13 01:36
VLAI?
Details

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.

Severity ?
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2017-7518"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-755"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-30T15:29:00Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.",
  "id": "GHSA-hwr9-p63p-wq87",
  "modified": "2022-05-13T01:36:19Z",
  "published": "2022-05-13T01:36:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7518"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/articles/3290921"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:0395"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:0412"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3619-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3619-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3754-1"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2017/dsa-3981"
    },
    {
      "type": "WEB",
      "url": "https://www.spinics.net/lists/kvm/msg151817.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2017/06/23/5"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/99263"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038782"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • 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.



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