Detections
Analytics
Alpine: multiple synapse packages: security update to 1.47.1-r0
high Tenable Cloud Security Plugin ID 407305
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Synapse is a package for Matrix homeservers written in Python 3/Twisted. Prior to version 1.47.1, Synapse
instances with the media repository enabled can be tricked into downloading a file from a remote server
into an arbitrary directory. No authentication is required for the affected endpoint. The last 2
directories and file name of the path are chosen randomly by Synapse and cannot be controlled by an
attacker, which limits the impact. Homeservers with the media repository disabled are unaffected.
Homeservers with a federation whitelist are also unaffected, since Synapse will check the remote hostname,
including the trailing `../`s, against the whitelist. Server administrators should upgrade to 1.47.1 or
later. Server administrators using a reverse proxy could, at the expense of losing media functionality,
may block the certain endpoints as a workaround. Alternatively, non-containerized deployments can be
adapted to use the hardened systemd config. (CVE-2021-41281)
See Also
Plugin Details
Severity: High
ID: 407305
Version: Revision 1.27
Type: Local
Published: 10/31/2023
Updated: 8/29/2025
Supported Sensors: Agentless Assessment
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.18
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2021-41281
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 11/23/2021
Reference Information
CVE: CVE-2021-41281