CVE-2021-34334: Denial of service due to integer overflow in loop counter
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. An infinite loop is triggered when Exiv2 is used to read 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. The bug is fixed in version v0.27.5.
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/1766
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-hqjh-hpv8-8r9p
- 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-2021-34334?
CVE-2021-34334 has a severity rating that indicates it can lead to denial of service due to an infinite loop.
How do I fix CVE-2021-34334?
To fix CVE-2021-34334, you should update Exiv2 to a version higher than 0.27.4.
What software is affected by CVE-2021-34334?
CVE-2021-34334 affects Exiv2 versions up to and including 0.27.4, as well as certain Fedora and Debian distributions.
What can an attacker do with CVE-2021-34334?
An attacker can exploit CVE-2021-34334 to cause an infinite loop when Exiv2 processes a specially crafted image file.
Is there a workaround for CVE-2021-34334?
There are no known workarounds for CVE-2021-34334; the best approach is to update the affected software.
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- collector/nvd-api
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- vendor/exiv2
- canonical/centos dos2unix
- version/centos dos2unix/0.27.4
- vendor/fedoraproject
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- version/fedora/33
- version/fedora/34
- vendor/debian
- canonical/debian
- version/debian/10.0