CVE-2023-39326

Public on 2023-12-06
Modified on 2024-01-23
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.
Severity
Medium severity
Medium
CVSS v3 Base Score
4.3
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core amazon-cloudwatch-agent 2024-01-19 ALAS2-2024-2424 Fixed
Amazon Linux 2023 amazon-cloudwatch-agent 2024-01-19 ALAS2023-2024-498 Fixed
Amazon Linux 2023 amazon-ecr-credential-helper Pending Fix
Amazon Linux 1 amazon-ssm-agent 2024-02-14 ALAS-2024-1920 Fixed
Amazon Linux 2 - Core amazon-ssm-agent 2024-02-15 ALAS2-2024-2458 Fixed
Amazon Linux 2023 amazon-ssm-agent 2024-02-15 ALAS2023-2024-526 Fixed
Amazon Linux 2 - Core cni-plugins Pending Fix
Amazon Linux 2023 cni-plugins Pending Fix
Amazon Linux 1 containerd Pending Fix
Amazon Linux 2 - Docker Extra containerd 2024-02-01 ALAS2DOCKER-2024-037 Fixed
Amazon Linux 2 - Ecs Extra containerd 2024-03-04 ALAS2ECS-2024-035 Fixed
Amazon Linux 2 - Aws-nitro-enclaves-cli Extra containerd 2024-02-01 ALAS2NITRO-ENCLAVES-2024-037 Fixed
Amazon Linux 2023 containerd 2024-01-19 ALAS2023-2024-499 Fixed
Amazon Linux 2 - Core cri-tools 2024-02-01 ALAS2-2024-2446 Fixed
Amazon Linux 1 docker Pending Fix
Amazon Linux 2 - Core docker Pending Fix
Amazon Linux 2023 docker 2024-02-29 ALAS2023-2024-542 Fixed
Amazon Linux 2023 ecs-init Pending Fix
Amazon Linux 1 golang 2024-01-03 ALAS-2024-1903 Fixed
Amazon Linux 2 - Core golang 2024-01-03 ALAS2-2024-2388 Fixed
Amazon Linux 2023 golang 2024-01-03 ALAS2023-2024-477 Fixed
Amazon Linux 2 - Core golist Pending Fix
Amazon Linux 2 - Core nerdctl Pending Fix
Amazon Linux 2023 nerdctl 2024-02-15 ALAS2023-2024-529 Fixed
Amazon Linux 2023 oci-add-hooks Pending Fix
Amazon Linux 2023 runc 2024-01-25 ALAS2023-2024-501 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N