A mingw-djvulibre security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: mingw-djvulibre-3.5.27-12.fc34

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Fedora Update Notification
FEDORA-2021-f3183da6bb
2021-06-04 01:12:01.240299
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Name : mingw-djvulibre
Product : Fedora 34
Version : 3.5.27
Release : 12.fc34
URL :   http://djvu.sourceforge.net/
Summary : MinGW Windows djvulibre library
Description :
MinGW Windows djvulibre library.

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Update Information:

Apply fix for CVE-2021-3500. ---- Apply fix for CVE-2021-32490,
CVE-2021-32491, CVE-2021-32492, CVE-2021-32493
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ChangeLog:

* Wed May 26 2021 Sandro Mani - 3.5.27-12
- Apply fix for CVE-2021-3500
* Tue May 25 2021 Sandro Mani - 3.5.27-11
- Apply fix for CVE-2021-32490, CVE-2021-32491, CVE-2021-32492, CVE-2021-32493
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References:

[ 1 ] Bug #1958165 - CVE-2021-3500 mingw-djvulibre: djvulibre: Stack overflow in function DJVU::DjVuDocument::get_djvu_file() via crafted djvu file [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1958165
[ 2 ] Bug #1958172 - CVE-2021-32490 mingw-djvulibre: djvulibre: Out of bounds write in function DJVU::filter_bv() via crafted djvu file [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1958172
[ 3 ] Bug #1958176 - CVE-2021-32491 mingw-djvulibre: djvulibre: Integer overflow in function render() in tools/ddjvu via crafted djvu file [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1958176
[ 4 ] Bug #1958178 - CVE-2021-32492 mingw-djvulibre: djvulibre: Out of bounds read in function DJVU::DataPool::has_data() via crafted djvu file [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1958178
[ 5 ] Bug #1958180 - CVE-2021-32493 mingw-djvulibre: djvulibre: Heap buffer overflow in function DJVU::GBitmap::decode() via crafted djvu file [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1958180
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-f3183da6bb' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys