CVE-2021-46312

DjVu is a set of compression technologies, a file format, and a software platform for the deliveryover the Web of digital documents, scanned documents, and high resolution images.DjVu documents download and display extremely quickly, and look exactly the same on all platforms with no compatibility problems due to fonts, colors, etc. DjVu can be seen as a superior alternative to PDF and PostScript for digital documents, to TIFF (and PDF) for scanned bitonal documents, to JPEG and JPEG2000 for photographs and pictures, and to GIF for large palettized images. DjVu is the only Web format that is practical for distributing high-resolution scanned documents in color.

Security Fix(es):

An issue was discovered IW44Image.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.(CVE-2021-46310)

An issue was discovered IW44EncodeCodec.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.(CVE-2021-46312)

Root has patched CVE-2021-46312 in the djvulibre package for Root:Debian:12. Multiple fixed versions available.

An issue was discovered IW44EncodeCodec.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.

An issue was discovered IW44Image.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.

These are all security issues fixed in the djvulibre-3.5.28-6.1 package on the GA media of openSUSE Tumbleweed.

This update for djvulibre fixes the following issues:

• CVE-2021-46310: Fixed divide by zero in IW44Image.cpp (bsc#1214670).
• CVE-2021-46312: Fixed divide by zero in IW44EncodeCodec.cpp (bsc#1214672).

This update for djvulibre fixes the following issues:

• CVE-2021-46310: Fixed divide by zero in IW44Image.cpp (bsc#1214670).
• CVE-2021-46312: Fixed divide by zero in IW44EncodeCodec.cpp (bsc#1214672).
• CVE-2021-32490: Fixed out of bounds write in function DJVU:filter_bv() via crafted djvu file (bsc#1185895).

It was discovered that DjVuLibre could be forced to execute a division by zero in certain instances. A remote attacker could possibly use this issue to cause applications to stop responding or crash, resulting in a denial of service. (CVE-2021-46312)

It was discovered that DjVuLibre incorrectly handled certain memory operations. If a user or automated system were tricked into processing a specially crafted DjVu file, a remote attacker could cause applications to stop responding or crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2025-53367)