Vulnerability-Lookup

GHSA-HP96-66JQ-Q83W

Vulnerability from github – Published: 2022-05-24 17:16 – Updated: 2022-05-24 17:16

Details

BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value can be a .pdf filename while the presFilename (mixed case) value has a ../ sequence. This can be leveraged for privilege escalation via a directory traversal to bigbluebutton.properties. NOTE: this issue exists because of an ineffective mitigation to CVE-2020-12112 in which there was an attempted fix within an NGINX configuration file, without considering that the relevant part of NGINX is case-insensitive.

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{
  "affected": [],
  "aliases": [
    "CVE-2020-12443"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-29T02:15:00Z",
    "severity": "HIGH"
  },
  "details": "BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value can be a .pdf filename while the presFilename (mixed case) value has a ../ sequence. This can be leveraged for privilege escalation via a directory traversal to bigbluebutton.properties. NOTE: this issue exists because of an ineffective mitigation to CVE-2020-12112 in which there was an attempted fix within an NGINX configuration file, without considering that the relevant part of NGINX is case-insensitive.",
  "id": "GHSA-hp96-66jq-q83w",
  "modified": "2022-05-24T17:16:51Z",
  "published": "2022-05-24T17:16:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12443"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bigbluebutton/bigbluebutton/pull/9259/commits/b21ca8355a57286a1e6df96984b3a4c57679a463"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mclab-hbrs/BBB-POC"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2020-12443 (GCVE-0-2020-12443)

Vulnerability from cvelistv5 – Published: 2020-04-29 01:48 – Updated: 2024-08-04 11:56

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre

References

2 references

URL	Tags
https://github.com/mclab-hbrs/BBB-POC	x_refsource_MISC
https://github.com/bigbluebutton/bigbluebutton/pu…	x_refsource_MISC

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:56:52.060Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/mclab-hbrs/BBB-POC"
          },
          {
            "tags": [
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            ],
            "url": "https://github.com/bigbluebutton/bigbluebutton/pull/9259/commits/b21ca8355a57286a1e6df96984b3a4c57679a463"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
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      "descriptions": [
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        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "description": "n/a",
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              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2020-04-29T01:48:39.000Z",
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      "references": [
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          ],
          "url": "https://github.com/bigbluebutton/bigbluebutton/pull/9259/commits/b21ca8355a57286a1e6df96984b3a4c57679a463"
        }
      ],
      "x_legacyV4Record": {
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          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-12443",
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                "vendor_name": "n/a"
              }
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        "description": {
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          ]
        },
        "problemtype": {
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  "cveMetadata": {
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    "assignerShortName": "mitre",
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    "datePublished": "2020-04-29T01:48:39.000Z",
    "dateReserved": "2020-04-29T00:00:00.000Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-HP96-66JQ-Q83W

CVE-2020-12443 (GCVE-0-2020-12443)

Tags

Sightings

Nomenclature