{"id":"CVE-2024-25623","state":"PUBLISHED","title":"Lack of media type verification of Activity Streams objects allows impersonation of remote accounts","description":"Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19, when fetching remote statuses, Mastodon doesn't check that the response from the remote server has a `Content-Type` header value of the Activity Streams media type, which allows a threat actor to upload a crafted Activity Streams document to a remote server and make a Mastodon server fetch it, if the remote server accepts arbitrary user uploads. The vulnerability allows a threat actor to impersonate an account on a remote server that satisfies all of the following properties: allows the attacker to register an account; accepts arbitrary user-uploaded documents and places them on the same domain as the ActivityPub actors; and serves user-uploaded document in response to requests with an `Accept` header value of the Activity Streams media type. Versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19 contain a fix for this issue.","publishedAt":"2024-02-19T15:28:15.296Z","updatedAt":"2024-08-01T23:44:09.828Z","severity":{"score":8.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["mastodon mastodon"],"affected":[{"vendor":"mastodon","product":"mastodon","versions":[{"version":"< 3.5.19","status":"affected"},{"version":">= 4.0.0, < 4.0.15","status":"affected"},{"version":">= 4.1.0, < 4.1.15","status":"affected"},{"version":">= 4.2.0, < 4.2.7","status":"affected"}]}],"references":["https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36","https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/25xxx/CVE-2024-25623.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-25623","state":"PUBLISHED","datePublished":"2024-02-19T15:28:15.296Z","dateUpdated":"2024-08-01T23:44:09.828Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2024-02-08T22:26:33.511Z"},"containers":{"cna":{"title":"Lack of media type verification of Activity Streams objects allows impersonation of remote accounts","descriptions":[{"lang":"en","value":"Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19, when fetching remote statuses, Mastodon doesn't check that the response from the remote server has a `Content-Type` header value of the Activity Streams media type, which allows a threat actor to upload a crafted Activity Streams document to a remote server and make a Mastodon server fetch it, if the remote server accepts arbitrary user uploads. The vulnerability allows a threat actor to impersonate an account on a remote server that satisfies all of the following properties: allows the attacker to register an account; accepts arbitrary user-uploaded documents and places them on the same domain as the ActivityPub actors; and serves user-uploaded document in response to requests with an `Accept` header value of the Activity Streams media type. Versions 4.2.7, 4.1.15, 4.0.15, and 3.5.19 contain a fix for this issue."}],"affected":[{"vendor":"mastodon","product":"mastodon","versions":[{"version":"< 3.5.19","status":"affected"},{"version":">= 4.0.0, < 4.0.15","status":"affected"},{"version":">= 4.1.0, < 4.1.15","status":"affected"},{"version":">= 4.2.0, < 4.2.7","status":"affected"}]}],"references":[{"url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36","name":"https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022","name":"https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","lang":"en","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2024-02-19T15:28:15.296Z"},"source":{"advisory":"GHSA-jhrq-qvrm-qr36","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-25623","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-20T18:34:37.609043Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-07-05T17:21:47.723Z"}},{"title":"CVE Program Container","references":[{"url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36","name":"https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022","name":"https://github.com/mastodon/mastodon/commit/9fee5e852669e26f970e278021302e1a203fc022","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-01T23:44:09.828Z"}}]}}}