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.
History

Tue, 17 Jun 2025 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat stf
CPEs cpe:/a:redhat:service_telemetry_framework:1.5::el8 cpe:/a:redhat:stf:1.5::el8
Vendors & Products Redhat service Telemetry Framework
Redhat stf

cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published: 2023-12-06T16:27:53.832Z

Updated: 2025-02-13T17:02:50.990Z

Reserved: 2023-07-27T17:05:55.188Z

Link: CVE-2023-39326

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-12-06T17:15:07.147

Modified: 2024-11-21T08:15:09.890

Link: CVE-2023-39326

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-12-06T00:00:00Z

Links: CVE-2023-39326 - Bugzilla