[USN-4763-1] Pillow vulnerabilities

========================================================================== Ubuntu Security Notice USN-4763-1 March 11, 2021
pillow vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS – Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Pillow.
Software Description: – pillow: Python Imaging Library
Details:
It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. (CVE-2021-25289, CVE-2021-25291)
It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-25290)
It was discovered that Pillow incorrectly handled certain PDF files. If a user or automated system were tricked into opening a specially-crafted PDF file, a remote attacker could cause Pillow to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-25292)
It was discovered that Pillow incorrectly handled certain SGI image files. If a user or automated system were tricked into opening a specially-crafted SGI file, a remote attacker could possibly cause Pillow to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-25293)
Jiayi Lin, Luke Shaffer, Xinran Xie, and Akshay Ajayan discovered that Pillow incorrectly handled certain BLP files. If a user or automated system were tricked into opening a specially-crafted BLP file, a remote attacker could possibly cause Pillow to consume resources, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-27921)
Jiayi Lin, Luke Shaffer, Xinran Xie, and Akshay Ajayan discovered that Pillow incorrectly handled certain ICNS files. If a user or automated system were tricked into opening a specially-crafted ICNS file, a remote attacker could possibly cause Pillow to consume resources, resulting in a denial of service. (CVE-2021-27922)
Jiayi Lin, Luke Shaffer, Xinran Xie, and Akshay Ajayan discovered that Pillow incorrectly handled certain ICO files. If a user or automated system were tricked into opening a specially-crafted ICO file, a remote attacker could possibly cause Pillow to consume resources, resulting in a denial of service. (CVE-2021-27922)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: python3-pil 7.2.0-1ubuntu0.2
Ubuntu 20.04 LTS: python3-pil 7.0.0-4ubuntu0.3
Ubuntu 18.04 LTS: python-pil 5.1.0-1ubuntu0.5 python3-pil 5.1.0-1ubuntu0.5
Ubuntu 16.04 LTS: python-pil 3.1.2-0ubuntu1.6 python3-pil 3.1.2-0ubuntu1.6
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-4763-1 CVE-2021-25289, CVE-2021-25290, CVE-2021-25291, CVE-2021-25292, CVE-2021-25293, CVE-2021-27921, CVE-2021-27922, CVE-2021-27923
Package Information: launchpad.net/ubuntu/+source/pillow/7.2.0-1ubuntu0.2 launchpad.net/ubuntu/+source/pillow/7.0.0-4ubuntu0.3 launchpad.net/ubuntu/+source/pillow/5.1.0-1ubuntu0.5 launchpad.net/ubuntu/+source/pillow/3.1.2-0ubuntu1.6