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AUSCERT External Security Bulletin Redistribution
ESB-2021.1667
USN-4957-1: DjVuLibre vulnerabilities
18 May 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: DjVuLibre
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote with User Interaction
Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-32493 CVE-2021-32492 CVE-2021-32491
CVE-2021-32490 CVE-2021-3500
Original Bulletin:
https://ubuntu.com/security/notices/USN-4957-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running DjVuLibre check for an updated version of the software for
their operating system.
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USN-4957-1: DjVuLibre vulnerabilities
17 May 2021
Several security issues were fixed in DjVuLibre.
Releases
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o djvulibre - DjVu image format library and tools
Details
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
o libdjvulibre21 - 3.5.28-1ubuntu0.1
Ubuntu 20.10
o libdjvulibre21 - 3.5.27.1-15ubuntu0.1
Ubuntu 20.04
o libdjvulibre21 - 3.5.27.1-14ubuntu0.1
Ubuntu 18.04
o libdjvulibre21 - 3.5.27.1-8ubuntu0.3
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
o CVE-2021-32493
o CVE-2021-32490
o CVE-2021-3500
o CVE-2021-32492
o CVE-2021-32491
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