CVE-2018-10657

Publication date 2 May 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.

Read the notes from the security team

Status

Package Ubuntu Release Status
matrix-synapse 23.04 lunar
Fixed 0.28.1+dfsg-1
22.10 kinetic
Fixed 0.28.1+dfsg-1
22.04 LTS jammy
Fixed 0.28.1+dfsg-1
21.10 impish
Fixed 0.28.1+dfsg-1
21.04 hirsute
Fixed 0.28.1+dfsg-1
20.10 groovy
Fixed 0.28.1+dfsg-1
20.04 LTS focal
Fixed 0.28.1+dfsg-1
19.10 eoan
Fixed 0.28.1+dfsg-1
19.04 disco
Fixed 0.28.1+dfsg-1
18.10 cosmic
Fixed 0.28.1+dfsg-1
18.04 LTS bionic
Fixed 0.24.0+dfsg-1ubuntu0.1~esm1
17.10 artful Ignored end of life
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

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Notes

leosilva

code is quite different in bionic and artful versus patch.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
matrix-synapse

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references