Vulnerability Details : 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.
Vulnerability category: Server-side request forgery (SSRF)
Products affected by CVE-2023-42450
- cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-42450
0.28%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-42450
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST | |
|
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
2.2
|
2.7
|
GitHub, Inc. |
CWE ids for CVE-2023-42450
-
The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.Assigned by: security-advisories@github.com (Primary)
-
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-42450
-
https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4
Server-side request forgery · Advisory · mastodon/mastodon · GitHubVendor Advisory
-
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2
Merge pull request from GHSA-hcqf-fw2r-52g4 · mastodon/mastodon@94893cf · GitHubPatch
Jump to