CVE-2021-29464 Heap buffer overflow in Exiv2::Jp2Image::encodeJp2Header
Attacker can execute arbitrary code by tricking a user into writing metadata to a crafted image file using the Exiv2 library.
- 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-2021-29464?
CVE-2021-29464 is a low-severity memory corruption vulnerability in Exiv2 Exiv2, published on 30 Apr 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 heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing 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 `insert`. The bug is fixed in version v0.27.4.
Which versions are affected by CVE-2021-29464?
It affects 2 products.
Products include Exiv2 Exiv2, Fedoraproject Fedora.
How do I fix CVE-2021-29464?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-29464 being exploited?
There is no known exploitation of CVE-2021-29464 in the wild and no public exploit code.
Other vulnerabilities in Exiv2 Exiv2
Sources
Also known as AZL-7209, CLEANSTART-2024-JB68762, DEBIAN-CVE-2021-29464, GHSA-jgm9-5fw5-pw9p, UBUNTU-CVE-2021-29464.