Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/52264?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/52264?format=api", "vulnerability_id": "VCID-vx5q-mbn5-8kcf", "summary": "matrix-android-sdk2 vulnerable to Olm/Megolm protocol confusion\n### Impact\nAn attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. \n\nAdditionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. matrix-android-sdk2 would then additionally sign such a key backup with its device key, spilling trust over to other devices trusting the matrix-android-sdk2 device.\n\nThese attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm.\n\n### Patches\n\nmatrix-android-sdk2 has been modified to only accept Olm-encrypted to-device messages and to stop signing backups on a successful decryption.\n\nOut of caution, several other checks have been audited or added:\n- Cleartext `m.room_key`, `m.forwarded_room_key` and `m.secret.send` to_device messages are discarded.\n- Secrets received from untrusted devices are discarded.\n- Key backups are only usable if they have a valid signature from a trusted device (no more local trust, or trust-on-decrypt).\n- The origin of a to-device message should only be determined by observing the Olm session which managed to decrypt the message, and not by using claimed sender_key, user_id, or any other fields controllable by the homeserver.\n\n\n### Workarounds\n\nAs this attack requires coordination between a malicious home server and an attacker, if you trust your home server no particular workaround is needed. Notice that the backup spoofing attack is a particularly sophisticated targeted attack.\n\nWe are not aware of this attack being used in the wild, though specifying a false positive-free way of noticing malicious key backups key is challenging.\n\nAs an abundance of caution, to avoid malicious backup attacks, you should not verify your new logins using emoji/QR verifications methods until patched. Prefer using verify with passphrase.\n\n\n### References\nBlog post: https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients\n\n### For more information\nIf you have any questions or comments about this advisory, e-mail us at [security@matrix.org](mailto:security@matrix.org).", "aliases": [ { "alias": "CVE-2022-39248" }, { "alias": "GHSA-fpgf-pjjv-2qgm" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/80107?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.5.1", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.5.1" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/261033?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@0.0.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-k87r-mnjz-tkc9" }, { "vulnerability": "VCID-mwm6-1d7e-mfev" }, { "vulnerability": "VCID-r2zf-yxr7-gke9" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@0.0.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/261034?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.2.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-mwm6-1d7e-mfev" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.2.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/39388?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.2.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.2.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/334446?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/334447?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/334448?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.4" }, { "url": "http://public2.vulnerablecode.io/api/packages/334449?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.7", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.7" }, { "url": "http://public2.vulnerablecode.io/api/packages/334450?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.8", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.8" }, { "url": "http://public2.vulnerablecode.io/api/packages/334451?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.9" }, { "url": "http://public2.vulnerablecode.io/api/packages/334452?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.10", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.10" }, { "url": "http://public2.vulnerablecode.io/api/packages/334453?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.13", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.13" }, { "url": "http://public2.vulnerablecode.io/api/packages/334454?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.14", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.14" }, { "url": "http://public2.vulnerablecode.io/api/packages/334455?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.18", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.3.18" }, { "url": "http://public2.vulnerablecode.io/api/packages/334456?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/334457?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.4" }, { "url": "http://public2.vulnerablecode.io/api/packages/334458?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.11", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.11" }, { "url": "http://public2.vulnerablecode.io/api/packages/334459?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.13", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.13" }, { "url": "http://public2.vulnerablecode.io/api/packages/334460?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.14", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.14" }, { "url": "http://public2.vulnerablecode.io/api/packages/334461?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.16", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.16" }, { "url": "http://public2.vulnerablecode.io/api/packages/334462?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.25", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.25" }, { "url": "http://public2.vulnerablecode.io/api/packages/334463?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.27", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.27" }, { "url": "http://public2.vulnerablecode.io/api/packages/334464?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.32", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.32" }, { "url": "http://public2.vulnerablecode.io/api/packages/334465?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.34", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.34" }, { "url": "http://public2.vulnerablecode.io/api/packages/144565?format=api", "purl": "pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.36", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-dvrk-p9dt-y7h6" }, { "vulnerability": "VCID-vx5q-mbn5-8kcf" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.matrix.android/matrix-android-sdk2@1.4.36" } ], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2022-39248", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50596", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50558", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50612", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50565", "published_at": "2026-05-09T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50619", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50616", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50659", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50636", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50622", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50664", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50669", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50648", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50604", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50549", "published_at": "2026-05-12T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50519", "published_at": "2026-05-11T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50535", "published_at": "2026-05-07T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50585", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00272", "scoring_system": "epss", "scoring_elements": "0.50482", "published_at": "2026-05-05T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2022-39248" }, { "reference_url": "https://github.com/matrix-org/matrix-android-sdk2", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/matrix-org/matrix-android-sdk2" }, { "reference_url": "https://github.com/matrix-org/matrix-android-sdk2/commit/77df720a238d17308deab83ecaa37f7a4740a17e", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:50:46Z/" } ], "url": "https://github.com/matrix-org/matrix-android-sdk2/commit/77df720a238d17308deab83ecaa37f7a4740a17e" }, { "reference_url": "https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.5.1", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:50:46Z/" } ], "url": "https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.5.1" }, { "reference_url": "https://github.com/matrix-org/matrix-android-sdk2/security/advisories/GHSA-fpgf-pjjv-2qgm", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:50:46Z/" } ], "url": "https://github.com/matrix-org/matrix-android-sdk2/security/advisories/GHSA-fpgf-pjjv-2qgm" }, { "reference_url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:50:46Z/" } ], "url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2022-39248", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.6", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-39248" }, { "reference_url": "https://github.com/advisories/GHSA-fpgf-pjjv-2qgm", "reference_id": "GHSA-fpgf-pjjv-2qgm", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-fpgf-pjjv-2qgm" } ], "weaknesses": [ { "cwe_id": 287, "name": "Improper Authentication", "description": "When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct." }, { "cwe_id": 322, "name": "Key Exchange without Entity Authentication", "description": "The product performs a key exchange with an actor without verifying the identity of that actor." }, { "cwe_id": 1035, "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017." }, { "cwe_id": 937, "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013." } ], "exploits": [], "severity_range_score": "7.0 - 8.9", "exploitability": "0.5", "weighted_severity": "8.0", "risk_score": 4.0, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-vx5q-mbn5-8kcf" }