CVE-2023-36461: Mastodon is a free, open-source social network server based on ActivityPub. When performing outgoing HTTP queries, Mastodon sets a timeout on individual read…

PriorityP341high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

1.14%

62.7th percentile

Mastodon is a free, open-source social network server based on ActivityPub. When performing outgoing HTTP queries, Mastodon sets a timeout on individual read operations. Prior to versions 3.5.9, 4.0.5, and 4.1.3, a malicious server can indefinitely extend the duration of the response through slowloris-type attacks. This vulnerability can be used to keep all Mastodon workers busy for an extended duration of time, leading to the server becoming unresponsive. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
joinmastodon	mastodon	< 3.5.9	3.5.9
joinmastodon	mastodon	>= 4.0.0 < 4.0.5	4.0.5
joinmastodon	mastodon	>= 4.1.0 < 4.1.3	4.1.3
mastodon	mastodon	< 3.5.9	3.5.9
mastodon	mastodon	—	—
mastodon	mastodon	—	—

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