Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| mastodon | mastodon | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Joinmastodon | Mastodon |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.195% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Joinmastodon
Joinmastodon mastodon |
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| Vendors & Products |
Joinmastodon
Joinmastodon mastodon |
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| Description | Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's normalization of incoming activities signed with Linked-Data Signatures does not sufficiently protect the activities from a certain class of spoofing, allowing attackers to re-arrange a valid signed JSON-LD activity from a third-party actor to have it processed differently. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23. | |
| Title | Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring | |
| Weaknesses | CWE-347 | |
| References |
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| Metrics |
cvssV3_1
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