[USN-5227-2] Pillow vulnerabilities

========================================================================== Ubuntu Security Notice USN-5227-2 January 17, 2022
pillow vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in Pillow.
Software Description: – pillow: Python Imaging Library
Details:
USN-5227-1 fixed several vulnerabilities in Pillow. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that Pillow incorrectly handled certain image files. If a user or automated system were tricked into opening a specially-crafted file, a remote attacker could cause Pillow to hang, resulting in a denial of service. (CVE-2021-23437)
It was discovered that Pillow incorrectly handled certain image files. If a user or automated system were tricked into opening a specially-crafted file, a remote attacker could cause Pillow to crash, resulting in a denial of service. This issue ony affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 21.04. (CVE-2021-34552)
It was discovered that Pillow incorrectly handled certain image files. If a user or automated system were tricked into opening a specially-crafted file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-22815)
It was discovered that Pillow incorrectly handled certain image files. If a user or automated system were tricked into opening a specially-crafted file, a remote attacker could cause Pillow to crash, resulting in a denial of service. (CVE-2022-22816)
It was discovered that Pillow incorrectly handled certain image files. If a user or automated system were tricked into opening a specially-crafted file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-22817)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 ESM: python-pil 3.1.2-0ubuntu1.6+esm1 python3-pil 3.1.2-0ubuntu1.6+esm1
Ubuntu 14.04 ESM: python-pil 2.3.0-1ubuntu3.4+esm3 python3-pil 2.3.0-1ubuntu3.4+esm3
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5227-2 ubuntu.com/security/notices/USN-5227-1 CVE-2021-23437, CVE-2021-34552, CVE-2022-22815, CVE-2022-22816, CVE-2022-22817