Vulnerability-Lookup

GSD-2022-39249

Vulnerability from gsd - Updated: 2023-12-13 01:19

Details

Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.

Aliases

CVE-2022-39249

Aliases

CVE-2022-39249

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2022-39249",
    "description": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.",
    "id": "GSD-2022-39249",
    "references": [
      "https://advisories.mageia.org/CVE-2022-39249.html",
      "https://access.redhat.com/errata/RHSA-2022:7178",
      "https://access.redhat.com/errata/RHSA-2022:7181",
      "https://access.redhat.com/errata/RHSA-2022:7182",
      "https://access.redhat.com/errata/RHSA-2022:7183",
      "https://access.redhat.com/errata/RHSA-2022:7184",
      "https://access.redhat.com/errata/RHSA-2022:7190",
      "https://www.suse.com/security/cve/CVE-2022-39249.html",
      "https://ubuntu.com/security/CVE-2022-39249"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      "aliases": [
        "CVE-2022-39249"
      ],
      "details": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.",
      "id": "GSD-2022-39249",
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          },
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                "value": "CWE-287: Improper Authentication"
              }
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        ]
      },
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          {
            "name": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76",
            "refsource": "MISC",
            "url": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76"
          },
          {
            "name": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0",
            "refsource": "MISC",
            "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
          },
          {
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            "refsource": "MISC",
            "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3061"
          },
          {
            "name": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients",
            "refsource": "MISC",
            "url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients"
          },
          {
            "name": "GLSA-202210-35",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202210-35"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-6263-x97c-c4gg",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
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        {
          "affected_range": "\u003c19.7.0",
          "affected_versions": "All versions before 19.7.0",
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          "cwe_ids": [
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            "CWE-937"
          ],
          "date": "2022-12-08",
          "description": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others. This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end. Starting with version 19.7.0, the default policy for accepting key forwards has been made more strict in the matrix-js-sdk. matrix-js-sdk will now only accept forwarded keys in response to previously issued requests and only from own, verified devices. The SDK now sets a `trusted` flag on the decrypted message upon decryption, based on whether the key used to decrypt the message was received from a trusted source. Clients need to ensure that messages decrypted with a key with `trusted = false` are decorated appropriately, for example, by showing a warning for such messages. This attack requires coordination between a malicious homeserver and an attacker, and those who trust your homeservers do not need a workaround.",
          "fixed_versions": [
            "19.7.0"
          ],
          "identifier": "CVE-2022-39249",
          "identifiers": [
            "CVE-2022-39249",
            "GHSA-6263-x97c-c4gg"
          ],
          "not_impacted": "All versions starting from 19.7.0",
          "package_slug": "npm/matrix-js-sdk",
          "pubdate": "2022-09-28",
          "solution": "Upgrade to version 19.7.0 or above.",
          "title": "Key Exchange without Entity Authentication",
          "urls": [
            "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg",
            "https://nvd.nist.gov/vuln/detail/CVE-2022-39249",
            "https://github.com/matrix-org/matrix-spec-proposals/pull/3061",
            "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76",
            "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0",
            "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients",
            "https://github.com/advisories/GHSA-6263-x97c-c4gg"
          ],
          "uuid": "a6178fa4-2134-4bc4-a65d-92693f5a0405"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:*",
                "cpe_name": [],
                "versionEndExcluding": "19.7.0",
                "vulnerable": true
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            },
            {
              "name": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0",
              "refsource": "MISC",
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              "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
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              "refsource": "MISC",
              "tags": [
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              "refsource": "MISC",
              "tags": [
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              "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3061"
            },
            {
              "name": "GLSA-202210-35",
              "refsource": "GENTOO",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202210-35"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
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          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-12-08T03:13Z",
      "publishedDate": "2022-09-28T20:15Z"
    }
  }
}

CVE-2022-39249 (GCVE-0-2022-39249)

Vulnerability from cvelistv5 – Published: 2022-09-28 00:00 – Updated: 2025-04-23 16:55

Title

Matrix Javascript SDK vulnerable to impersonation via forwarded Megolm sessions

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 15:51 UTC

CWE

CWE-322 - Key Exchange without Entity Authentication
CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/matrix-org/matrix-js-sdk/commi…
https://github.com/matrix-org/matrix-js-sdk/relea…
https://github.com/matrix-org/matrix-js-sdk/secur…
https://github.com/matrix-org/matrix-spec-proposa…
https://matrix.org/blog/2022/09/28/upgrade-now-to…
https://security.gentoo.org/glsa/202210-35	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
matrix-org	matrix-js-sdk	Affected: < 19.7.0

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-03T12:00:43.417Z",
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.