CVE-2021-34335: Denial of service due to FPE in Exiv2::Internal::resolveLens0xffff
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. A floating point exception (FPE) due to an integer divide by zero was found in Exiv2 versions v0.27.4 and earlier. The FPE is triggered when Exiv2 is used to print 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 printing the interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). 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 |
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Reference Links
- https://github.com/Exiv2/exiv2/pull/1750
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-pvjp-m4f6-q984
- 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-2021-34335?
CVE-2021-34335 has been classified as a high severity vulnerability due to the potential for exploitation via a floating point exception.
How do I fix CVE-2021-34335?
To fix CVE-2021-34335, update Exiv2 to version 0.27.5 or later, which addresses the identified vulnerability.
What software is affected by CVE-2021-34335?
CVE-2021-34335 affects Exiv2 versions 0.27.4 and earlier across multiple platforms, including Fedora 33 and 34.
What type of vulnerability is CVE-2021-34335?
CVE-2021-34335 is a floating point exception vulnerability caused by an integer divide by zero error.
What are the consequences of not addressing CVE-2021-34335?
If left unaddressed, CVE-2021-34335 could lead to application crashes or potentially allow for remote code execution in some scenarios.
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