Vulnerability-Lookup

GHSA-2GFR-HJCW-MR7Q

Vulnerability from github – Published: 2022-05-24 17:30 – Updated: 2024-03-21 03:33

Details

** DISPUTED ** An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as used in COVID-19 applications on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack. This can cause metadata deanonymization and risk-score inflation. NOTE: the vendor's position is "We do not believe that TX power authentication would be a useful defense against relay attacks."

Severity

5.9 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2020-24722"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-294"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-10-07T15:15:00Z",
    "severity": "MODERATE"
  },
  "details": "** DISPUTED ** An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as used in COVID-19 applications on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack. This can cause metadata deanonymization and risk-score inflation. NOTE: the vendor\u0027s position is \"We do not believe that TX power authentication would be a useful defense against relay attacks.\"",
  "id": "GHSA-2gfr-hjcw-mr7q",
  "modified": "2024-03-21T03:33:56Z",
  "published": "2022-05-24T17:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-24722"
    },
    {
      "type": "WEB",
      "url": "https://blog.google/inside-google/company-announcements/update-exposure-notifications"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.md#additional-considerations"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2020/Oct/12"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2020-24722 (GCVE-0-2020-24722)

Vulnerability from cvelistv5 – Published: 2020-10-07 14:07 – Updated: 2024-08-04 15:19 Disputed

Summary

An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as used in COVID-19 applications on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack. This can cause metadata deanonymization and risk-score inflation. NOTE: the vendor's position is "We do not believe that TX power authentication would be a useful defense against relay attacks.

Severity

No CVSS data available.

CWE

Assigner

mitre

References

4 references

URL	Tags
https://blog.google/inside-google/company-announc…	x_refsource_MISC
http://seclists.org/fulldisclosure/2020/Oct/12	x_refsource_MISC
https://github.com/google/exposure-notifications-…	x_refsource_MISC
http://packetstormsecurity.com/files/159496/GAEN-…	x_refsource_MISC

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JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
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.

Action not permitted

GHSA-2GFR-HJCW-MR7Q

CVE-2020-24722 (GCVE-0-2020-24722)

Tags

Sightings

Nomenclature