7.5
HIGH
CVE-2023-36461
Mastodon Slowloris Denial of Service
Description

Mastodon is a free, open-source social network server based on ActivityPub. When performing outgoing HTTP queries, Mastodon sets a timeout on individual read operations. Prior to versions 3.5.9, 4.0.5, and 4.1.3, a malicious server can indefinitely extend the duration of the response through slowloris-type attacks. This vulnerability can be used to keep all Mastodon workers busy for an extended duration of time, leading to the server becoming unresponsive. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.

INFO

Published Date :

July 6, 2023, 7:15 p.m.

Last Modified :

July 14, 2023, 7:25 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2023-36461 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 Joinmastodon mastodon
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-36461.

URL Resource
http://www.openwall.com/lists/oss-security/2023/07/06/7 Mailing List
https://github.com/mastodon/mastodon/commit/c5929798bf7e56cc2c79b15bed0c4692ded3dcb6 Patch Third Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v3.5.9 Third Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v4.0.5 Third Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v4.1.3 Third Party Advisory
https://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwc Third Party Advisory

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).

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

The following list is the news that have been mention CVE-2023-36461 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-36461 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 [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jul. 14, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://www.openwall.com/lists/oss-security/2023/07/06/7 No Types Assigned http://www.openwall.com/lists/oss-security/2023/07/06/7 Mailing List
    Changed Reference Type https://github.com/mastodon/mastodon/commit/c5929798bf7e56cc2c79b15bed0c4692ded3dcb6 No Types Assigned https://github.com/mastodon/mastodon/commit/c5929798bf7e56cc2c79b15bed0c4692ded3dcb6 Patch, Third Party Advisory
    Changed Reference Type https://github.com/mastodon/mastodon/releases/tag/v3.5.9 No Types Assigned https://github.com/mastodon/mastodon/releases/tag/v3.5.9 Third Party Advisory
    Changed Reference Type https://github.com/mastodon/mastodon/releases/tag/v4.0.5 No Types Assigned https://github.com/mastodon/mastodon/releases/tag/v4.0.5 Third Party Advisory
    Changed Reference Type https://github.com/mastodon/mastodon/releases/tag/v4.1.3 No Types Assigned https://github.com/mastodon/mastodon/releases/tag/v4.1.3 Third Party Advisory
    Changed Reference Type https://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwc No Types Assigned https://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwc Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.9 *cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.0.5 *cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:* versions from (including) 4.1.0 up to (excluding) 4.1.3
  • CVE Modified by [email protected]

    Jul. 07, 2023

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2023/07/06/7 [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-2023-36461 is associated with the following CWEs:

Exploit Prediction

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

0.19 }} 0.02%

score

0.56889

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability