Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request with a non-English Accept-Language header. Using this behavior, an attacker who knows the identifier of a particular status they are not allowed to see can confirm whether this status exists or not. This cannot be used to learn the contents of the status or any other property besides its existence. This issue is fixed in versions 4.2.28, 4.3.15, 4.4.10 and 4.5.3.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

响应差异性信息暴露

Mastodon 安全漏洞

Mastodon是Mastodon开源的一款基于ActivityPub的开源社交网络服务器。 Mastodon存在安全漏洞，该漏洞源于错误处理不一致，可能导致状态存在性泄露。以下版本受到影响：4.2.27及之前版本、4.3.0-beta.1版本至4.3.14版本、4.4.0-beta.1版本至4.4.9版本和4.5.0-beta.1版本至4.5.2版本。

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