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Flooding logfiles with a 1 Bit BMP File

Platform: ownCloud Server

Versions: 8.1.11, 8.2.9, 9.0.7, 9.1.3,

Date: 2/2/2017


Risk level: Medium

CVSS v3 Base Score: 4.1 (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N)

CWE: Logging of Excessive Data (CWE-779)


An Attacker can upload a 1 Bit BMP File and the server hangs and doesn’t stop to populate a logfile

Affected Software

Action Taken

Suppress error messages with 1 Bit BMP Files


The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory:

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