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vuln-cve/data/2023/40xxx/CVE-2023-40021.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"cveMetadata": {
"cveId": "CVE-2023-40021",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2023-08-08T13:46:25.243Z",
"datePublished": "2023-08-16T20:25:22.726Z",
"dateUpdated": "2024-10-03T13:37:09.373Z"
},
"containers": {
"cna": {
"title": "Timing Attack Reveals CSRF Tokens in oppia",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-203",
"lang": "en",
"description": "CWE-203: Observable Discrepancy",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-208",
"lang": "en",
"description": "CWE-208: Observable Timing Discrepancy",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/oppia/oppia/security/advisories/GHSA-49jp-pjc3-2532",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/oppia/oppia/security/advisories/GHSA-49jp-pjc3-2532"
},
{
"name": "https://github.com/oppia/oppia/pull/18769",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/oppia/oppia/pull/18769"
},
{
"name": "https://github.com/oppia/oppia/commit/b89bf808378c1236874b5797a7bda32c77b4af23",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/oppia/oppia/commit/b89bf808378c1236874b5797a7bda32c77b4af23"
},
{
"name": "https://github.com/oppia/oppia/blob/3a05c3558a292f3db9e658e60e708c266c003fd0/core/controllers/base.py#L964-L990",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/oppia/oppia/blob/3a05c3558a292f3db9e658e60e708c266c003fd0/core/controllers/base.py#L964-L990"
}
],
"affected": [
{
"vendor": "oppia",
"product": "oppia",
"versions": [
{
"version": ">= 1.1.0, < 3.3.2-hotfix-2",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2023-08-16T20:25:22.726Z"
},
"descriptions": [
{
"lang": "en",
"value": "Oppia is an online learning platform. When comparing a received CSRF token against the expected token, Oppia uses the string equality operator (`==`), which is not safe against timing attacks. By repeatedly submitting invalid tokens, an attacker can brute-force the expected CSRF token character by character. Once they have recovered the token, they can then submit a forged request on behalf of a logged-in user and execute privileged actions on that user's behalf. In particular the function to validate received CSRF tokens is at `oppia.core.controllers.base.CsrfTokenManager.is_csrf_token_valid`. An attacker who can lure a logged-in Oppia user to a malicious website can perform any change on Oppia that the user is authorized to do, including changing profile information; creating, deleting, and changing explorations; etc. Note that the attacker cannot change a user's login credentials. An attack would need to complete within 1 second because every second, the time used in computing the token changes. This issue has been addressed in commit `b89bf80837` which has been included in release `3.3.2-hotfix-2`. Users are advised to upgrade. There are no known workarounds for this vulnerability."
}
],
"source": {
"advisory": "GHSA-49jp-pjc3-2532",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-02T18:24:54.658Z"
},
"title": "CVE Program Container",
"references": [
{
"name": "https://github.com/oppia/oppia/security/advisories/GHSA-49jp-pjc3-2532",
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/oppia/oppia/security/advisories/GHSA-49jp-pjc3-2532"
},
{
"name": "https://github.com/oppia/oppia/pull/18769",
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/oppia/oppia/pull/18769"
},
{
"name": "https://github.com/oppia/oppia/commit/b89bf808378c1236874b5797a7bda32c77b4af23",
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/oppia/oppia/commit/b89bf808378c1236874b5797a7bda32c77b4af23"
},
{
"name": "https://github.com/oppia/oppia/blob/3a05c3558a292f3db9e658e60e708c266c003fd0/core/controllers/base.py#L964-L990",
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/oppia/oppia/blob/3a05c3558a292f3db9e658e60e708c266c003fd0/core/controllers/base.py#L964-L990"
}
]
},
{
"affected": [
{
"vendor": "oppia",
"product": "oppia",
"cpes": [
"cpe:2.3:a:oppia:oppia:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"versions": [
{
"version": "1.1.0",
"status": "affected",
"lessThan": "3.3.2",
"versionType": "custom"
}
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2024-10-03T13:33:01.578679Z",
"id": "CVE-2023-40021",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2024-10-03T13:37:09.373Z"
}
}
]
}
}