Debian: DSA-4786-1 Critical: libexif Buffer Overflow Risk

It was discovered that a boundary check in libexif, a library to parse
EXIF files, could be optimised away by the compiler, resulting in
a potential buffer overflow.

For the stable distribution (buster), this problem has been fixed in
version 0.6.21-5.1+deb10u5.

We recommend that you upgrade your libexif packages.

For the detailed security status of libexif please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libexif

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/