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Vulnerability · Published Jul 6, 2023 · Assigned by GitHub_M

CVE-2023-36460Mastodon vulnerable to arbitrary file creation through media attachments

Critical 10.0

In plain English

A critical-severity path traversal in mastodon from mastodon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 40.1% (higher than 99% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)40.1%top 1.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 3.5.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, attackers using carefully crafted media files can cause Mastodon's media processing code to create arbitrary files at any location. This allows attackers to create and overwrite any file Mastodon has access to, allowing Denial of Service and arbitrary Remote Code Execution. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.

Affected products (as reported)

VendorProductVersions
mastodon mastodon >= 3.5.0, < 3.5.9>= 4.0.0, < 4.0.5>= 4.1.0, < 4.1.3

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References