CVE-2021-29457

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.

Bugs

• <https://bugs.launchpad.net/ubuntu/+source/exiv2/+bug/1923479&gt;