=========================================================================
Ubuntu Security Notice USN-7707-1
August 20, 2025

tiff vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in LibTIFF.

Software Description:
- tiff: Tag Image File Format (TIFF) library

Details:

It was discovered that LibTIFF incorrectly handled certain memory
operations when using tiffmedian tool. An attacker could trick a user into
processing a specially crafted tiff image file and potentially use this
issue to cause a denial of service. (CVE-2025-8176)

It was discovered that LibTIFF did not properly perform bounds checking
in certain operations when using thumbnail tool. An attacker could trick
a user into processing a specially crafted tiff image file and
potentially use this issue to cause a denial of service. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2025-8177)

It was discovered that LibTIFF incorrectly handled certain memory
operations when using tiff2ps tool. An attacker could trick a user into
processing a specially crafted tiff image file and potentially use this
issue to cause a denial of service. (CVE-2025-8534)

It was discovered that LibTIFF did not properly perform bounds checking
in certain operations when using tiffcrop tool. An attacker could trick
a user into processing a specially crafted tiff image file and
potentially use this issue to cause a denial of service. (CVE-2025-8851)

Update instructions:

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

Ubuntu 25.04
  libtiff-tools                   4.5.1+git230720-4ubuntu4.1
  libtiff6                        4.5.1+git230720-4ubuntu4.1

Ubuntu 24.04 LTS
  libtiff-tools                   4.5.1+git230720-4ubuntu2.3
  libtiff6                        4.5.1+git230720-4ubuntu2.3

Ubuntu 22.04 LTS
  libtiff-tools                   4.3.0-6ubuntu0.11
  libtiff5                        4.3.0-6ubuntu0.11

Ubuntu 20.04 LTS
  libtiff-tools                   4.1.0+git191117-2ubuntu0.20.04.14+esm1
                                  Available with Ubuntu Pro
  libtiff5                        4.1.0+git191117-2ubuntu0.20.04.14+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libtiff-tools                   4.0.9-5ubuntu0.10+esm8
                                  Available with Ubuntu Pro
  libtiff5                        4.0.9-5ubuntu0.10+esm8
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libtiff-tools                   4.0.6-1ubuntu0.8+esm18
                                  Available with Ubuntu Pro
  libtiff5                        4.0.6-1ubuntu0.8+esm18
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libtiff-tools                   4.0.3-7ubuntu0.11+esm15
                                  Available with Ubuntu Pro
  libtiff5                        4.0.3-7ubuntu0.11+esm15
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7707-1
  CVE-2025-8176, CVE-2025-8177, CVE-2025-8534, CVE-2025-8851

Package Information:
  https://launchpad.net/ubuntu/+source/tiff/4.5.1+git230720-4ubuntu4.1
  https://launchpad.net/ubuntu/+source/tiff/4.5.1+git230720-4ubuntu2.3
  https://launchpad.net/ubuntu/+source/tiff/4.3.0-6ubuntu0.11