Bug 1858253 (CVE-2020-15117)

Summary:	CVE-2020-15117 synergy: kMsgHelloBack packet with client name length of 0xffffffff causing DoS
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	chkr, dchen, pgagne
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:	2020-07-17 13:27:47 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:	1858254, 1858255
Bug Blocks:

Description Dhananjay Arunesh 2020-07-17 11:21:31 UTC

In Synergy before version 1.12.0, a Synergy server can be crashed by receiving a kMsgHelloBack packet with a client name length set to 0xffffffff (4294967295) if the servers memory is less than 4 GB. It was verified that this issue does not cause a crash through the exception handler if the available memory of the Server is more than 4GB.

References:
https://github.com/symless/synergy-core/commit/0a97c2be0da2d0df25cb86dfd642429e7a8bea39
https://github.com/symless/synergy-core/security/advisories/GHSA-chfm-333q-gfpp

Comment 1 Dhananjay Arunesh 2020-07-17 11:22:13 UTC

Created synergy tracking bugs for this issue:

Affects: epel-all [bug 1858255]
Affects: fedora-all [bug 1858254]

Comment 2 Product Security DevOps Team 2020-07-17 13:27:47 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.