Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.0715
USN-4755-1: LibTIFF vulnerabilities
26 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: LibTIFF
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-35524 CVE-2020-35523
Original Bulletin:
https://ubuntu.com/security/notices/USN-4755-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running LibTIFF check for an updated version of the software for
their operating system.
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4755-1: LibTIFF vulnerabilities
25 February 2021
Several security issues were fixed in LibTIFF.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o tiff - Tag Image File Format (TIFF) library
Details
It was discovered that LibTIFF incorrectly handled certain malformed
images. If a user or automated system were tricked into opening a specially
crafted image, a remote attacker could crash the application, leading to a
denial of service, or possibly execute arbitrary code with user privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o libtiff-tools - 4.1.0+git191117-2ubuntu0.20.10.1
o libtiff5 - 4.1.0+git191117-2ubuntu0.20.10.1
Ubuntu 20.04
o libtiff-tools - 4.1.0+git191117-2ubuntu0.20.04.1
o libtiff5 - 4.1.0+git191117-2ubuntu0.20.04.1
Ubuntu 18.04
o libtiff-tools - 4.0.9-5ubuntu0.4
o libtiff5 - 4.0.9-5ubuntu0.4
Ubuntu 16.04
o libtiff-tools - 4.0.6-1ubuntu0.8
o libtiff5 - 4.0.6-1ubuntu0.8
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-35524
o CVE-2020-35523
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=Msg0
-----END PGP SIGNATURE-----