CVE-2021-34335 Denial of service due to FPE in Exiv2::Internal::resolveLens0xffff
An attacker can cause a denial of service via a crafted image file when Exiv2 prints interpreted metadata using specific command-line options.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-34335?
CVE-2021-34335 is a medium-severity denial of service vulnerability in Exiv2 Exiv2, published on 9 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-369
Which versions are affected by CVE-2021-34335?
It affects 2 products.
Products include Exiv2 Exiv2, Fedoraproject Fedora.
How do I fix CVE-2021-34335?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-34335 being exploited?
There is no known exploitation of CVE-2021-34335 in the wild and no public exploit code.
Other vulnerabilities in Exiv2 Exiv2
Sources
Also known as AZL-7216, CLEANSTART-2024-WE33081, DEBIAN-CVE-2021-34335, GHSA-pvjp-m4f6-q984, JLSEC-2026-1305, UBUNTU-CVE-2021-34335.