Bug 1992198 (CVE-2021-32815)

Summary:	CVE-2021-32815 exiv2: DoS due to assertion failure in crwimage_int.cpp
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	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:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	1992199, 1992200, 1996064, 1996065, 1996066
Bug Blocks:	1992216

Description Guilherme de Almeida Suckevicz 2021-08-10 17:58:05 UTC

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The assertion failure is triggered when Exiv2 is used to modify the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when modifying 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 `fi`. ### Patches The bug is fixed in version v0.27.5. ### References Regression test and bug fix: #1739 ### For more information Please see our [security policy](https://github.com/Exiv2/exiv2/security/policy) for information about Exiv2 security.

Reference:
https://github.com/Exiv2/exiv2/security/advisories/GHSA-mv9g-fxh2-m49m

Upstream patch:
https://github.com/Exiv2/exiv2/pull/1739

Comment 1 Guilherme de Almeida Suckevicz 2021-08-10 17:58:22 UTC

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1992200]


Created mingw-exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1992199]

Comment 2 Garrett Tucker 2021-08-20 12:53:39 UTC

The attack vector for this CVE is local, not network based. Exiv2 would require manual execution with specific flags, and requires user interaction on a crafted file to be able to exploit this flaw and is not bound to the network.