CVE-2023-39326

Aliases:GO-2023-2382BIT-golang-2023-39326
Advisory lineage Upstream: 0 Downstream: 30
Modified
Published: 06 Dec 2023, 16:27
Last modified:13 Feb 2025, 17:02

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.1 (nvd)
EPSS Score
0.12% LOW
0% probability +0.06%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Dec 2023, 16:27
Published
Vulnerability first disclosed
13 Feb 2025, 17:02
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Trends

Current EPSS score: 0.12%• Percentile: 31%

Affected Systems

  • go standard library•net/http/internal

    < 1.20.12 | ≥ 1.21.0-0, < 1.21.5

  • golang•go

    < 1.20.12 | ≥ 1.21.0-0, < 1.21.5

  • Go•stdlib

    ≥ 1.21.0-0, < 1.21.5

References (5)