A vulnerability was found in Pillow up to 6.2.1. It has been declared as problematic. Affected by this vulnerability is the function range of the file FpxImagePlugin.py. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

There is a DoS vulnerability in Pillow before 6.2.2 caused by FpxImagePlugin.py calling the range function on an unvalidated 32-bit integer if the number of bands is large. On Windows running 32-bit Python, this results in an OverflowError or MemoryError due to the 2 GB limit. However, on Linux running 64-bit Python this results in the process being terminated by the OOM killer.

The weakness was released 01/05/2020 (Website). It is possible to read the advisory at pillow.readthedocs.io. This vulnerability is known as CVE-2019-19911 since 12/19/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 6.2.2 eliminates this vulnerability.

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• Pillow

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• 6.2.0
• 6.2.1

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• open-source

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