Bug 1770333 (CVE-2019-18835)

Summary:	CVE-2019-18835 matrix-synapse: mishandles signature checking on some federation APIs
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	djc, jeremy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-11-09 00:51:39 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1770334
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-08 19:01:44 UTC

Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.

Reference:
https://github.com/matrix-org/synapse/pull/6262

Comment 1 Guilherme de Almeida Suckevicz 2019-11-08 19:01:57 UTC

Created matrix-synapse tracking bugs for this issue:

Affects: fedora-all [bug 1770334]

Comment 3 Product Security DevOps Team 2019-11-09 00:51:39 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.