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Date: Thu, 6 Jul 2023 18:29:23 -0400
From: Jan Schaumann <jschauma@...meister.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2023-36461: mastodon: Denial of Service through slow HTTP
responses
(I have no affiliation with the project, but posting
this here because it seems to me that increasingly
non-packaged / GitHub distributed projects tend not to
send out announcements here.)
https://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwc
(This advisory describes an issue found by Cure53 as
part of an audit performed at Mozilla's request)
When performing outgoing HTTP queries, Mastodon sets a
timeout on individual read operations, but a malicious
server can indefinitely extend the duration of the
response through slowloris-type attacks.
Impact
This vulnerability can be used to keep all Mastodon
workers busy for an extended duration of time, leading
to the server becoming unresponsive.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: 7.5/10
CVE-2023-36461
Affected versions: all
Patched versions: 4.1.3, 4.0.5, 3.5.9
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