CVE-2021-32815 Denial of service due to assertion failure in crwimage_int.cpp
An attacker can cause a denial of service by tricking a user into modifying metadata of a crafted image file using Exiv2.
- 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-2021-32815?
CVE-2021-32815 is a medium-severity denial of service vulnerability in Debian Debian Linux, 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. 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.
Weakness: CWE-617
Which versions are affected by CVE-2021-32815?
It affects 3 products.
Products include Debian Debian Linux, Exiv2 Exiv2, Fedoraproject Fedora.
How do I fix CVE-2021-32815?
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-2021-32815 being exploited?
There is no known exploitation of CVE-2021-32815 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-7214, CLEANSTART-2024-NN11025, DEBIAN-CVE-2021-32815, GHSA-mv9g-fxh2-m49m, JLSEC-2026-1303, UBUNTU-CVE-2021-32815.