From 55b0aa847a61774b6a3acdc4b177a20dc019f01a Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Tue, 23 Apr 2024 15:24:08 +0100 Subject: Fix GHSA-3h7q-rfh9-xm4v Weakness in auth chain indexing allows DoS from remote room members through disk fill and high CPU usage. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.104.1, can dispatch specially crafted events to exploit a weakness in how the auth chain cover index is calculated. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. --- changelog.d/17044.misc | 1 + 1 file changed, 1 insertion(+) create mode 100644 changelog.d/17044.misc (limited to 'changelog.d/17044.misc') diff --git a/changelog.d/17044.misc b/changelog.d/17044.misc new file mode 100644 index 0000000000..a1439752d3 --- /dev/null +++ b/changelog.d/17044.misc @@ -0,0 +1 @@ +Refactor auth chain fetching to reduce duplication. -- cgit 1.5.1