Several vulnerabilities were discovered in djvulibre, a library and
set of tools to handle documents in the DjVu format. An attacker could
crash document viewers and possibly execute arbitrary code through
crafted DjVu files.
For the oldstable distribution (buster), these problems have been fixed
in version 18.104.22.168-10+deb10u1.
For the stable distribution (bullseye), these problems have been fixed in version 3.5.28-2.
We recommend that you upgrade your djvulibre packages.