Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2023-39326: 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.
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | cni-plugins | 0:1.2.0-1.amzn2.0.5 |
| Amazon Linux · 2 | cni-plugins-debuginfo | 0:1.2.0-1.amzn2.0.5 |
Vulnerabilities 1
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Unscored —
Denial of service via chunk extensions in net/http
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 rea…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2023-39326.html