Bug 1961691 (CVE-2021-32617) - CVE-2021-32617 exiv2: DoS due to quadratic complexity in ProcessUTF8Portion
Summary: CVE-2021-32617 exiv2: DoS due to quadratic complexity in ProcessUTF8Portion
Alias: CVE-2021-32617
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1961692 1961693 1964188 1964189 1964190
Blocks: 1961694
TreeView+ depends on / blocked
Reported: 2021-05-18 13:57 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-17 21:23 UTC (History)
4 users (show)

Fixed In Version: exiv2 0.27.4
Doc Type: If docs needed, set a value
Doc Text:
There's a flaw in the xmpsdk component shipped with exiv2. An attacker who is able to submit a crafted file to be processed by an application linked with the exiv2 library could cause an excessive consumption of resources, potentially leading to denial of service. The greatest impact of this flaw is to system availability.
Clone Of:
Last Closed: 2021-11-02 23:31:45 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4173 0 None None None 2021-11-09 17:34:29 UTC

Description Guilherme de Almeida Suckevicz 2021-05-18 13:57:14 UTC
Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An inefficient algorithm (quadratic complexity) was found in Exiv2 versions v0.27.3 and earlier. The inefficient algorithm 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, if they can trick the victim into running Exiv2 on a crafted image file. The bug is fixed in version v0.27.4. 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 `rm`.


Upstream patch:

Comment 1 Guilherme de Almeida Suckevicz 2021-05-18 13:58:05 UTC
Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1961692]

Created mingw-exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1961693]

Comment 3 errata-xmlrpc 2021-11-09 17:34:28 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

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