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CVE-2025-58057— Netty's BrotliDecoder is vulnerable to DoS via zip bomb style attack

Quick assessment

Affected
netty netty
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netty是Netty社区的一款非阻塞I/O客户端-服务器框架，它主要用于开发Java网络应用程序，如协议服务器和客户端等。 Netty 4.1.124.Final及之前版本和4.2.4.Final及之前版本存在安全漏洞，该漏洞源于BrotliDecoder和其他解压缩解码器在处理特制输入时分配大量可访问字节缓冲区，可能导致拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-58057

Vulnerability Information
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Vulnerability Title
Netty's BrotliDecoder is vulnerable to DoS via zip bomb style attack
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
Netty 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netty是Netty社区的一款非阻塞I/O客户端-服务器框架，它主要用于开发Java网络应用程序，如协议服务器和客户端等。 Netty 4.1.124.Final及之前版本和4.2.4.Final及之前版本存在安全漏洞，该漏洞源于BrotliDecoder和其他解压缩解码器在处理特制输入时分配大量可访问字节缓冲区，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
netty netty <= 4.1.124.Final, < 4.1.125.Final -

II. Public POCs for CVE-2025-58057

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III. Intelligence Information for CVE-2025-58057

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Vendor Advisories for CVE-2025-58057 (1)

IV. Related Vulnerabilities

Same product: netty
Same vendor: netty
Same weakness: CWE-409

V. Comments for CVE-2025-58057

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