Bug 1978100 (CVE-2021-29463)

Summary:	CVE-2021-29463 exiv2: Out-of-bounds read in Exiv2::WebPImage::doWriteMetadata
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jgrulich, manisandro, michel, rdieter
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	exiv2 0.27.4	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 22:22:30 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:	1978103, 1982185, 1989561, 1989562, 1989860
Bug Blocks:	1982181

Description Dhananjay Arunesh 2021-07-01 06:58:45 UTC

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.

References:
https://github.com/Exiv2/exiv2/commit/783b3a6ff15ed6f82a8f8e6c8a6f3b84a9b04d4b
https://github.com/Exiv2/exiv2/security/advisories/GHSA-5p8g-9xf3-gfrr

Comment 1 Dhananjay Arunesh 2021-07-01 07:01:12 UTC

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1978103]

Comment 2 Michael Kaplan 2021-07-14 12:02:59 UTC

Created mingw-exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1982185]

Comment 4 errata-xmlrpc 2021-11-09 17:34:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4173 https://access.redhat.com/errata/RHSA-2021:4173

Comment 5 Product Security DevOps Team 2021-11-09 22:22:29 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-2021-29463