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Date: Tue, 13 Jul 2021 17:15:51 +0000
From: Stefan Bodewig <>
Subject: CVE-2021-36374: Apache Ant ZIP, and ZIP based, archive denial of
 service vulerability 


When reading a specially crafted ZIP archive, or a derived formats, an Apache Ant build can be made to allocate large amounts of memory that leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant.

Commonly used derived formats from ZIP archives are for instance JAR files and many office files.


Apache Ant 1.9.x users should upgrade to 1.9.16 or later.
Apache Ant 1.10.x users should upgrade to 1.10.11 or later.


This issue is similar to present in Apache Commons Compress which has been detected by OSS Fuzz.


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