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USN-4957-1: DjVuLibre vulnerabilities

17 May 2021

Several security issues were fixed in DjVuLibre.



  • djvulibre - DjVu image format library and tools


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 hang or crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.04
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

Related notices

  • USN-4957-2: djvulibre-bin, djview3, libdjvulibre21, djvuserve, djview, djvulibre-desktop, libdjvulibre-dev, libdjvulibre-text, djvulibre