vulnerability

Amazon Linux AMI: CVE-2023-39326: Security patch for amazon-ssm-agent ((Multiple Advisories))

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Dec 6, 2023
Added
Jan 9, 2024
Modified
May 21, 2025

Description

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.

Solution(s)

amazon-linux-upgrade-amazon-ssm-agentamazon-linux-upgrade-golang
Title
NEW

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