CVE-2023-42450

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 4.2.0-beta1 and prior to version 4.2.0-rc2, by crafting specific input, attackers can inject arbitrary data into HTTP requests issued by Mastodon. This can be used to perform confused deputy attacks if the server configuration includes `ALLOWED_PRIVATE_ADDRESSES` to allow access to local exploitable services. Version 4.2.0-rc2 has a patch for the issue.
HTTP Request/Response Splitting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
GitHub_MCNA
5.4 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 51%
VendorProductVersion
joinmastodonmastodon
4.2.0:beta1
joinmastodonmastodon
4.2.0:beta2
joinmastodonmastodon
4.2.0:beta3
joinmastodonmastodon
4.2.0:rc1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2
https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2
https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4