Bug 1852809 (CVE-2020-15396)

Summary:	CVE-2020-15396 hylafax+: race condition in faxsetup utility could lead to privileges escalation
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	faxguy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	hylafax+ 7.0.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-07-01 13:27:37 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:	1852810, 1852811
Bug Blocks:

Description Marian Rehak 2020-07-01 10:59:09 UTC

In HylaFAX+ through 7.0.2 and HylaFAX Enterprise, the faxsetup utility calls chown on files in user-owned directories. By winning a race, a local attacker could use this to escalate his privileges to root.

Upstream Reference:

https://sourceforge.net/p/hylafax/HylaFAX+/2534/

Comment 1 Marian Rehak 2020-07-01 10:59:36 UTC

Created hylafax+ tracking bugs for this issue:

Affects: epel-all [bug 1852811]
Affects: fedora-all [bug 1852810]

Comment 2 Product Security DevOps Team 2020-07-01 13:27:37 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.