ghsa-9345-957r-vw5m
Vulnerability from github
Published
2022-01-06 00:00
Modified
2022-03-17 00:06
Details

Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713

Show details on source website


{
   affected: [],
   aliases: [
      "CVE-2021-28712",
   ],
   database_specific: {
      cwe_ids: [],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2022-01-05T17:15:00Z",
      severity: "MODERATE",
   },
   details: "Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as \"driver domains\". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713",
   id: "GHSA-9345-957r-vw5m",
   modified: "2022-03-17T00:06:18Z",
   published: "2022-01-06T00:00:30Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2021-28712",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html",
      },
      {
         type: "WEB",
         url: "https://www.debian.org/security/2022/dsa-5050",
      },
      {
         type: "WEB",
         url: "https://www.debian.org/security/2022/dsa-5096",
      },
      {
         type: "WEB",
         url: "https://xenbits.xenproject.org/xsa/advisory-391.txt",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
}


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