Lucene search

[email protected]CVE-2021-28693

HistoryJun 30, 2021 - 11:15 a.m.

CVE-2021-28693

2021-06-3011:15:08

[email protected]

web.nvd.nist.gov

xen

arm

cve-2021-28693

boot modules

scrub

sensitive data

leakage

nvd

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

12.8%

JSON

xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs…) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must “scrub” them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.

Affected configurations

NVD

Node

xenxenRange4.12.0–4.15.0

xenxenMatch4.15.0rc1

CPENameOperatorVersion
xen:xenxenle4.15.0

CPE	Name	Operator	Version
xen:xen	xen	le	4.15.0

CNA Affected

[
  {
    "product": "xen",
    "vendor": "Xen",
    "versions": [
      {
        "status": "affected",
        "version": "4.15.x"
      }
    ]
  },
  {
    "product": "xen",
    "vendor": "Xen",
    "versions": [
      {
        "lessThan": "4.12",
        "status": "unknown",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "4.13.x",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unaffected",
        "version": "next of 4.14.x",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "xen",
    "vendor": "Xen",
    "versions": [
      {
        "status": "affected",
        "version": "xen-unstable"
      }
    ]
  },
  {
    "product": "xen",
    "vendor": "Xen",
    "versions": [
      {
        "status": "affected",
        "version": "4.12.x"
      }
    ]
  }
]