gsd-2022-39249
Vulnerability from gsd
Modified
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
Aliases
{
"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"
},
"osvSchema": {
"aliases": [
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],
"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",
"modified": "2023-12-13T01:19:20.566182Z",
"schema_version": "1.4.0"
}
},
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"TITLE": "Matrix Javascript SDK vulnerable to impersonation via forwarded Megolm sessions"
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"affects": {
"vendor": {
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"product": {
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"version": {
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}
]
},
"impact": {
"cvss": {
"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",
"version": "3.1"
}
},
"problemtype": {
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"description": [
{
"lang": "eng",
"value": "CWE-322: Key Exchange without Entity Authentication"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-287: Improper Authentication"
}
]
}
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"references": {
"reference_data": [
{
"name": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76",
"refsource": "MISC",
"url": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76"
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{
"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"
},
{
"name": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg",
"refsource": "CONFIRM",
"url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg"
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{
"name": "https://github.com/matrix-org/matrix-spec-proposals/pull/3061",
"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": {
"advisories": [
{
"affected_range": "\u003c19.7.0",
"affected_versions": "All versions before 19.7.0",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-287",
"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"
}
]
},
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"cpe23Uri": "cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:*",
"cpe_name": [],
"versionEndExcluding": "19.7.0",
"vulnerable": true
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"operator": "OR"
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}
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"name": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76",
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"url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
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"name": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients",
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},
"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",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
},
"lastModifiedDate": "2022-12-08T03:13Z",
"publishedDate": "2022-09-28T20:15Z"
}
}
}
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