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Moderate severityNVD Advisory· Published Sep 3, 2025· Updated Sep 4, 2025

Netty's BrotliDecoder is vulnerable to DoS via zip bomb style attack

CVE-2025-58057

Description

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In netty-codec-compression versions 4.1.124.Final and below, and netty-codec versions 4.2.4.Final and below, when supplied with specially crafted input, BrotliDecoder and certain other decompression decoders will allocate a large number of reachable byte buffers, which can lead to denial of service. BrotliDecoder.decompress has no limit in how often it calls pull, decompressing data 64K bytes at a time. The buffers are saved in the output list, and remain reachable until OOM is hit. This is fixed in versions 4.1.125.Final of netty-codec and 4.2.5.Final of netty-codec-compression.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
io.netty:netty-codec-compressionMaven
>= 4.2.0.Alpha1, < 4.2.5.Final4.2.5.Final
io.netty:netty-codecMaven
< 4.1.125.Final4.1.125.Final

Affected products

614

Patches

Vulnerability mechanics

References

4

News mentions

0

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