Bug 1852836 (CVE-2020-10379)

Summary:	CVE-2020-10379 python-pillow: two buffer overflows in libImaging/TiffDecode.c due to small buffers allocated in ImagingLibTiffDecode()
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bdettelb, cstratak, manisandro, miminar, python-maint, tomckay, torsava, tsmetana
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-pillow 7.1.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-04 20:42:11 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:	1852837, 1852838
Bug Blocks:	1852831

Description Marian Rehak 2020-07-01 12:14:31 UTC

In Pillow before 6.2.3 and 7.x before 7.0.1, there are two Buffer Overflows in libImaging/TiffDecode.c.

Pull Request:

https://github.com/python-pillow/Pillow/pull/4538

Upstream Advisory:

https://pillow.readthedocs.io/en/stable/releasenotes/7.1.0.html

Upstream Advisory:

https://pillow.readthedocs.io/en/stable/releasenotes/6.2.3.html

Comment 1 Marian Rehak 2020-07-01 12:14:59 UTC

Created python-pillow tracking bugs for this issue:

Affects: fedora-31 [bug 1852838]
Affects: fedora-32 [bug 1852837]

Comment 4 Jason Shepherd 2020-07-02 01:30:37 UTC

Upstream commit:

https://github.com/python-pillow/Pillow/commit/46f4a349b88915787fea3fb91348bb1665831bbb

Comment 6 Riccardo Schirone 2020-07-06 14:22:49 UTC

The vulnerability was introduced with https://github.com/python-pillow/Pillow/commit/f0436a4ddc954541fa10a531e2d9ea0c5ae2065d and https://github.com/python-pillow/Pillow/commit/e91b851fdc1c914419543f485bdbaa010790719f, which add support for reading tiled TIFF images and add the realloc calls.

Comment 7 Riccardo Schirone 2020-07-06 14:26:16 UTC

Function ImagingLibTiffDecode() contains two buffer overflows due to missing checks on user-controlled sizes. Those sizes are used to realloc a buffer allocated in the heap, but they can be smaller than what expected by libtiff functions, used inside ImagingLibTiffDecode().

Comment 8 Riccardo Schirone 2020-07-06 14:40:19 UTC

Statement:

While python-pillow is listed as a dependency of Red Hat Quay, it is not used by the application.

This issue did not affect the versions of python-pillow as shipped with Red Hat Enterprise Linux 5, 6, 7, and 8 as they provide an older version of the code which does not include the vulnerable code.

Comment 9 errata-xmlrpc 2021-02-04 16:14:47 UTC

This issue has been addressed in the following products:

  Red Hat Quay 3

Via RHSA-2021:0420 https://access.redhat.com/errata/RHSA-2021:0420

Comment 10 Product Security DevOps Team 2021-02-04 20:42:11 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-2020-10379