CVE-2021-32815

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 for information
about Exiv2 security.