Bug 1631411 – CVE-2018-17175 python-marshmallow: Information leak due to invalid usage of the schema "only" option

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Bug 1631411 - (CVE-2018-17175) CVE-2018-17175 python-marshmallow: Information leak due to invalid usage of the schema "only" option

Summary:	CVE-2018-17175 python-marshmallow: Information leak due to invalid usage of t...

Status:	NEW

Aliases:	CVE-2018-17175

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20180413,repor...
Keywords:	Security

Depends On:	1631412 1631413
Blocks:	1631414
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Reported:	2018-09-20 10:17 EDT by Andrej Nemec
Modified:	2018-09-27 02:31 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:	python-marshmallow 2.15.1
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Description Andrej Nemec 2018-09-20 10:17:29 EDT

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 10:19:20 EDT

Created python-marshmallow tracking bugs for this issue:

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

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