Bug 1958800 (CVE-2021-21394)

Summary: CVE-2021-21394 matrix-synapse: missing input validation may cause excessive use of disk space and memory
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: djc, fedora
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: matrix-synapse 1.28.0 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-05-11 20:34:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1958801    
Bug Blocks:    

Description Marian Rehak 2021-05-10 07:58:18 UTC
In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.

Upstream reference:


Comment 1 Marian Rehak 2021-05-10 07:58:35 UTC
Created matrix-synapse tracking bugs for this issue:

Affects: fedora-all [bug 1958801]

Comment 2 Product Security DevOps Team 2021-05-11 20:34:03 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.