2021-36374 | Apache Ant ZIP Archive allocation of resources

By Max On Jul 18, 2021

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4.3	$0-$5k	0.67

A vulnerability, which was classified as problematic, was found in Apache Ant up to 1.9.15/1.10.10. This affects some unknown processing of the component ZIP Archive Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-770. This is going to have an impact on availability. The summary by CVE is:

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 prior to 1.9.16 and 1.10.11 were affected.

The weakness was presented 07/14/2021. The advisory is shared at lists.apache.org. This vulnerability is uniquely identified as CVE-2021-36374 since 07/12/2021. Access to the local network is required for this attack to succeed. Required for exploitation is a authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.9.16 or 1.10.11 eliminates this vulnerability.

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