CVE-2023-39326

CVE-2023-39326 · Denial of service via chunk extensions in net/http

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A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.

CVSS 5.3 · Moyenne · EPSS 1,2% · Correctif disponible

Publication

2023-12-06T16:27:53.832Z

Mise à jour

2025-02-13T17:02:50.990Z

Pile logicielle: system

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