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RSSHub vulnerable to Server-Side Request Forgery

Moderate severity GitHub Reviewed Published Mar 5, 2024 in DIYgod/RSSHub • Updated Mar 21, 2024

Package

npm rsshub (npm)

Affected versions

< 1.0.0-master.a429472

Patched versions

1.0.0-master.a429472

Description

Summary

Serveral Server-Side Request Forgery (SSRF) vulnerabilities in RSSHub allow remote attackers to use the server as a proxy to send HTTP GET requests to arbitrary targets and retrieve information in the internal network or conduct Denial-of-Service (DoS) attacks.

Details

/mastodon/acct/:acct/statuses/:only_media?

https://github.com/DIYgod/RSSHub/blob/5928c5db2472e101c2f5c3bafed77a2f72edd40a/lib/routes/mastodon/acct.js#L4-L7

https://github.com/DIYgod/RSSHub/blob/5928c5db2472e101c2f5c3bafed77a2f72edd40a/lib/routes/mastodon/utils.js#L85-L105

/zjol/paper/:id?

https://github.com/DIYgod/RSSHub/blob/172f6cfd2b69ea6affdbdedf61e6dde1671f3796/lib/routes/zjol/paper.js#L7-L13

/m4/:id?/:category*

https://github.com/DIYgod/RSSHub/blob/172f6cfd2b69ea6affdbdedf61e6dde1671f3796/lib/routes/m4/index.js#L10-L14

PoC

Impact

The attacker can send malicious requests to a RSSHub server, to make the server send HTTP GET requests to arbitrary destinations and see partial responses. This may lead to:

  1. Leak the server IP address, which could be hidden behind a CDN.
  2. Retrieve information in the internal network. e.g. which addresses/ports are accessible, the titles and meta descriptions of HTML pages.
  3. DoS amplification. The attacker could request the server to download some large files, or chain several SSRF requests in a single attacker request: https://rsshub.a.com/zjol/paper/rsshub.b.net%2Fzjol%2Fpaper%2Frsshub.a.com%252Fzjol%252Fpaper%252Frsshub.b.net%25252Fzjol%25252Fpaper%25252Frsshub.a.com%2525252Fzjol%2525252Fpaper%2525252Fexample.com%2525252523%25252523%252523%2523%23.

References

@DIYgod DIYgod published to DIYgod/RSSHub Mar 5, 2024
Published to the GitHub Advisory Database Mar 6, 2024
Reviewed Mar 6, 2024
Published by the National Vulnerability Database Mar 21, 2024
Last updated Mar 21, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

EPSS score

0.060%
(27th percentile)

Weaknesses

CVE ID

CVE-2024-27927

GHSA ID

GHSA-3p3p-cgj7-vgw3

Source code

Credits

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