Bug 1631411 (CVE-2018-17175)

Summary:	CVE-2018-17175 python-marshmallow: Information leak due to invalid usage of the schema "only" option
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, dbaker, igor.raits, jokerman, msuchy, praiskup, sthangav, trankin
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-marshmallow 2.15.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 22:18:20 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:	1631412, 1631413
Bug Blocks:	1631414

Description Andrej Nemec 2018-09-20 14:17:29 UTC

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to instead expose all fields (if the schema is being filtered dynamically using the "only" option, and there is a user role that produces an empty value for "only").

Upstream issue:

https://github.com/marshmallow-code/marshmallow/issues/772

Upstream patches:

[2.x]
https://github.com/marshmallow-code/marshmallow/pull/782

[master]
https://github.com/marshmallow-code/marshmallow/pull/777

Comment 1 Andrej Nemec 2018-09-20 14:19:20 UTC

Created python-marshmallow tracking bugs for this issue:

Affects: epel-all [bug 1631413]
Affects: fedora-all [bug 1631412]