USN-3090-2: Pillow regresssion

30 September 2016

Pillow regression

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

  • Ubuntu 14.04 LTS

Software Description

  • pillow - Python Imaging Library compatibility layer


USN-3090-1 fixed vulnerabilities in Pillow. The patch to fix CVE-2014-9601 caused a regression which resulted in failures when processing certain png images. This update temporarily reverts the security fix for CVE-2014-9601 pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that a flaw in processing a compressed text chunk in a PNG image could cause the image to have a large size when decompressed, potentially leading to a denial of service. (CVE-2014-9601)

Andrew Drake discovered that Pillow incorrectly validated input. A remote attacker could use this to cause Pillow to crash, resulting in a denial of service. (CVE-2014-3589)

Eric Soroos discovered that Pillow incorrectly handled certain malformed FLI, Tiff, and PhotoCD files. A remote attacker could use this issue to cause Pillow to crash, resulting in a denial of service. (CVE-2016-0740, CVE-2016-0775, CVE-2016-2533)

Update instructions

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

Ubuntu 14.04 LTS
python-imaging - 2.3.0-1ubuntu3.3
python-pil - 2.3.0-1ubuntu3.3
python3-imaging - 2.3.0-1ubuntu3.3
python3-pil - 2.3.0-1ubuntu3.3

To update your system, please follow these instructions: