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GHSA-3p3p-cgj7-vgw3

MediumCVSS 6.5 / 10
Published Mar 6, 2024·Last modified Mar 21, 2024
Affected Components(0)

No affected components available

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

  • https://rsshub.app/mastodon/acct/test@a6wt15r2.requestrepo.com%23/statuses
  • https://rsshub.app/zjol/paper/a6wt15r2.requestrepo.com%23
  • https://rsshub.app/m4/a6wt15r2.requestrepo.com%23/test

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.
Risk Scores
Base Score
6.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the availability of the system.

Threat Intelligence
6.0

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2024-27927
    Alias
  • EUVD-2024-0804
    Alias

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Medium severity
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