6.8 MEDIUM
- CVSS version (CVSS): 4.0
- Attack Vector (AV): Local (L)
- Attack Complexity (AC): Low (L)
- Attack Requirement (AT): None (N)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Vulnerable System Impact Confidentiality (VC): None (N)
- Vulnerable System Impact Integrity (VI): None (N)
- Vulnerable System Impact Availability (VA): High (H)
- Subsequent System Impact Confidentiality (SC): None (N)
- Subsequent System Impact Integrity (SI): None (N)
- Subsequent System Impact Availability (SA): None (N)
- Modified Attack Vector (MAV): Local (L)
- Modified Attack Complexity (MAC): Low (L)
- Modified Attack Requirement (MAT): None (N)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Vulnerable System Impact Confidentiality (MVC): None (N)
- Modified Vulnerable System Impact Integrity (MVI): None (N)
- Modified Vulnerable System Impact Availability (MVA): High (H)
- Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
- Modified Subsequent System Impact Integrity (MSI): Negligible (N)
- Modified Subsequent System Impact Availability (MSA): Negligible (N)
- Safety (S): Not Defined (X)
- Automatable (AU): Not Defined (X)
- Recovery (R): Not Defined (X)
- Value Density (V): Not Defined (X)
- Vulnerability Response Effort (RE): Not Defined (X)
- Provider Urgency (U): Not Defined (X)
- Confidentiality Req. (CR): Not Defined (X)
- Integrity Req. (IR): Not Defined (X)
- Availability Req. (AR): Not Defined (X)
- Exploit Maturity (E): Not Defined (X)
Activity log
- Created suggestion
Synapse CPU starvation (Denial of Service)
Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1.
References
-
https://github.com/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g x_refsource_CONFIRM
Affected products
- ==< 1.152.1
Matching in nixpkgs
pkgs.synapse
Semantic launcher to start applications and find relevant files
pkgs.synapse-bt
Flexible and fast BitTorrent daemon
-
nixos-unstable 2023-02-16
- nixpkgs-unstable 2023-02-16
- nixos-unstable-small 2023-02-16
-
nixos-25.11 2023-02-16
- nixos-25.11-small 2023-02-16
- nixpkgs-25.11-darwin 2023-02-16
pkgs.synapse-admin
Admin UI for Synapse Homeservers
pkgs.matrix-synapse
Matrix reference homeserver
pkgs.synapse-admin-etkecc
Maintained fork of the admin console for (Matrix) Synapse homeservers, including additional features
-
nixos-25.11 0.11.4-etke54
- nixos-25.11-small 0.11.4-etke54
- nixpkgs-25.11-darwin 0.11.4-etke54
pkgs.matrix-synapse-unwrapped
Matrix reference homeserver
pkgs.rust-synapse-compress-state
Tool to compress some state in a Synapse instance's database
pkgs.python312Packages.azure-mgmt-synapse
Microsoft Azure Synapse Management Client Library
pkgs.python313Packages.azure-mgmt-synapse
Microsoft Azure Synapse Management Client Library
pkgs.python314Packages.azure-mgmt-synapse
Microsoft Azure Synapse Management Client Library
pkgs.python312Packages.azure-synapse-spark
Microsoft Azure Synapse Spark Client Library
pkgs.python313Packages.azure-synapse-spark
Microsoft Azure Synapse Spark Client Library
pkgs.python314Packages.azure-synapse-spark
Microsoft Azure Synapse Spark Client Library
pkgs.matrix-synapse-plugins.matrix-synapse-pam
PAM auth provider for the Synapse Matrix server
pkgs.python312Packages.azure-synapse-artifacts
Microsoft Azure Synapse Artifacts Client Library for Python
pkgs.python313Packages.azure-synapse-artifacts
Microsoft Azure Synapse Artifacts Client Library for Python
pkgs.python314Packages.azure-synapse-artifacts
Microsoft Azure Synapse Artifacts Client Library for Python
pkgs.matrix-synapse-plugins.matrix-synapse-ldap3
LDAP3 auth provider for Synapse
-
nixos-unstable ldap3-0.4.0
- nixpkgs-unstable ldap3-0.4.0
- nixos-unstable-small ldap3-0.4.0
-
nixos-25.11 ldap3-0.3.0
- nixos-25.11-small ldap3-0.3.0
- nixpkgs-25.11-darwin ldap3-0.3.0
pkgs.matrix-synapse-plugins.synapse-http-antispam
Synapse module that forwards spam checking to an HTTP server
pkgs.python312Packages.azure-synapse-accesscontrol
Microsoft Azure Synapse AccessControl Client Library
pkgs.python313Packages.azure-synapse-accesscontrol
Microsoft Azure Synapse AccessControl Client Library
pkgs.python314Packages.azure-synapse-accesscontrol
Microsoft Azure Synapse AccessControl Client Library
pkgs.matrix-synapse-plugins.matrix-http-rendezvous-synapse
Implementation of MSC3886: Simple rendezvous capability
pkgs.matrix-synapse-plugins.matrix-synapse-mjolnir-antispam
AntiSpam / Banlist plugin to be used with mjolnir
pkgs.python312Packages.azure-synapse-managedprivateendpoints
Microsoft Azure Synapse Managed Private Endpoints Client Library
pkgs.python313Packages.azure-synapse-managedprivateendpoints
Microsoft Azure Synapse Managed Private Endpoints Client Library
pkgs.python314Packages.azure-synapse-managedprivateendpoints
Microsoft Azure Synapse Managed Private Endpoints Client Library
pkgs.matrix-synapse-plugins.matrix-synapse-shared-secret-auth
Shared Secret Authenticator password provider module for Matrix Synapse
pkgs.matrix-synapse-plugins.matrix-synapse-s3-storage-provider
Synapse storage provider to fetch and store media in Amazon S3
-
nixos-unstable s3-storage-provider-1.6.0
- nixpkgs-unstable s3-storage-provider-1.6.1
- nixos-unstable-small s3-storage-provider-1.6.1
-
nixos-25.11 s3-storage-provider-1.6.0
- nixos-25.11-small s3-storage-provider-1.6.0
- nixpkgs-25.11-darwin s3-storage-provider-1.6.0
Package maintainers
-
@mguentner Maximilian Güntner <code@mguentner.de>
-
@NickCao Nick Cao <nickcao@nichi.co>
-
@teutat3s teutat3s <teutates@mailbox.org>
-
@D4ndellion Daniel Olsen <daniel@dodsorf.as>
-
@Ma27 Maximilian Bosch <maximilian@mbosch.me>
-
@sumnerevans Sumner Evans <me@sumnerevans.com>
-
@SuperSandro2000 Sandro Jäckel <sandro.jaeckel@gmail.com>
-
@jojosch Johannes Schleifenbaum <johannes@js-webcoding.de>
-
@maralorn maralorn <mail@maralorn.de>
-
@mweinelt Martin Weinelt <hexa@darmstadt.ccc.de>
-
@2chilled Matthias Herrmann <matthias.mh.herrmann@gmail.com>
-
@mkg20001 Maciej Krüger <mkg20001+nix@gmail.com>
-
@dywedir Vladyslav M. <dywedir@gra.red>
-
@Defelo Defelo