Bug 1958263 (CVE-2021-28678)

Summary:	CVE-2021-28678 python-pillow: Excessive looping in BLP image reader
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bdettelb, cheimes, cstratak, kaycoth, manisandro, miminar, orion, paul, python-maint, tomckay, torsava
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-pillow-8.2.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in python-pillow. BlpImagePlugin did not properly check that reads after jumping to file offsets returned data. This could lead to a denial-of-service where the decoder could be run a large number of times on empty data.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 18:52:40 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:	1958264, 1958265, 1958266, 1958267, 1959683, 1962543, 1962545
Bug Blocks:	1958269

Description Guilherme de Almeida Suckevicz 2021-05-07 14:12:44 UTC

BlpImagePlugin did not properly check that reads after jumping to file offsets returned data. This could lead to a denial-of-service where the decoder could be run a large number of times on empty data. This dates to Pillow 5.1.0.

References:
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#security
https://github.com/python-pillow/Pillow/pull/5377

Comment 1 Guilherme de Almeida Suckevicz 2021-05-07 14:13:26 UTC

Created mingw-python-pillow tracking bugs for this issue:

Affects: fedora-all [bug 1958267]


Created python-pillow tracking bugs for this issue:

Affects: fedora-all [bug 1958264]


Created python2-pillow tracking bugs for this issue:

Affects: fedora-all [bug 1958265]


Created python3-pillow tracking bugs for this issue:

Affects: epel-7 [bug 1958266]

Comment 4 Sam Fowler 2021-05-11 00:27:28 UTC

Mitigation:

To mitigate this feature on Red Hat Quay keep the invoice generation feature disabled, as it is by default.

Comment 6 Riccardo Schirone 2021-05-20 09:02:20 UTC

Upstream patch:
https://github.com/python-pillow/Pillow/pull/5377/commits/496245aa4365d0827390bd0b6fbd11287453b3a1

Comment 9 errata-xmlrpc 2021-11-09 17:24:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4149 https://access.redhat.com/errata/RHSA-2021:4149

Comment 10 Product Security DevOps Team 2021-11-09 18:52:38 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-28678