5.3
MEDIUM
CVE-2023-39326
Apache HTTP Chunk Extension Data Inflation Memory Exhaustion Vulnerability
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.

INFO

Published Date :

Dec. 6, 2023, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 8:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-39326 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-39326 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Golang go
References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 4 months ago
0 stars 0 fork 0 watcher
Born at : July 5, 2024, 2:18 p.m. This repo has been linked 41 different CVEs too.

None

Dockerfile Go

Updated: 6 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : May 29, 2024, 6:54 p.m. This repo has been linked 78 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-39326 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-39326 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://go.dev/cl/547335
    Added Reference https://go.dev/issue/64433
    Added Reference https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/UIU6HOGV6RRIKWM57LOXQA75BGZSIH6G/
    Added Reference https://pkg.go.dev/vuln/GO-2023-2382
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jan. 20, 2024

    Action Type Old Value New Value
    Added Reference Go Project https://lists.fedoraproject.org/archives/list/[email protected]/message/UIU6HOGV6RRIKWM57LOXQA75BGZSIH6G/ [No types assigned]
  • Initial Analysis by [email protected]

    Dec. 12, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    Changed Reference Type https://go.dev/cl/547335 No Types Assigned https://go.dev/cl/547335 Patch
    Changed Reference Type https://go.dev/issue/64433 No Types Assigned https://go.dev/issue/64433 Issue Tracking, Patch, Vendor Advisory
    Changed Reference Type https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ No Types Assigned https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ Mailing List, Vendor Advisory
    Changed Reference Type https://pkg.go.dev/vuln/GO-2023-2382 No Types Assigned https://pkg.go.dev/vuln/GO-2023-2382 Patch, Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions up to (excluding) 1.20.12 *cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions from (including) 1.21.0-0 up to (excluding) 1.21.5
  • CVE Received by [email protected]

    Dec. 06, 2023

    Action Type Old Value New Value
    Added 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.
    Added Reference Go Project https://go.dev/issue/64433 [No types assigned]
    Added Reference Go Project https://go.dev/cl/547335 [No types assigned]
    Added Reference Go Project https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ [No types assigned]
    Added Reference Go Project https://pkg.go.dev/vuln/GO-2023-2382 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-39326 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-39326 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} 0.01%

score

0.40224

percentile

CVSS31 - Vulnerability Scoring System
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Attack Complexity
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