CVE-2021-32815: Denial of service due to assertion failure in crwimage_int.cpp
First published: Mon Aug 09 2021(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CentOS Dos2unix | <=0.27.4 | |
| Fedora | =33 | |
| Fedora | =34 | |
| Debian | =10.0 |
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Reference Links
- https://github.com/Exiv2/exiv2/pull/1739
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-mv9g-fxh2-m49m
- https://lists.debian.org/debian-lts-announce/2023/01/msg00004.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMDT4PJB7P43WSOM3TRQIY3J33BAFVVE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UYGDELIFFJWKUU7SO3QATCIXCZJERGAC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMDT4PJB7P43WSOM3TRQIY3J33BAFVVE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UYGDELIFFJWKUU7SO3QATCIXCZJERGAC/
- https://security.gentoo.org/glsa/202312-06
Frequently Asked Questions
What is the severity of CVE-2021-32815?
CVE-2021-32815 has been classified as a medium severity vulnerability.
How do I fix CVE-2021-32815?
To fix CVE-2021-32815, upgrade Exiv2 to version 0.27.5 or later.
What software is affected by CVE-2021-32815?
CVE-2021-32815 affects Exiv2 versions up to and including 0.27.4 and specific versions of Fedora and Debian.
What could an attacker achieve with CVE-2021-32815?
An attacker could exploit CVE-2021-32815 to cause an assertion failure while modifying image metadata.
Is CVE-2021-32815 related to image file metadata?
Yes, CVE-2021-32815 specifically involves vulnerabilities related to modifying the metadata of image files.
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