CVE-2024-41812: txtdot SSRF — Exploit & Fix

Description

txtdot is an HTTP proxy that parses only text, links, and pictures from pages, removing ads and heavy scripts. Prior to version 1.7.0, a Server-Side Request Forgery (SSRF) vulnerability in the `/get` route of txtdot allows remote attackers to use the server as a proxy to send HTTP GET requests to arbitrary targets and retrieve information in the internal network. Version 1.7.0 prevents displaying the response of forged requests, but the requests can still be sent. For complete mitigation, a firewall between txtdot and other internal network resources should be set.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
txtdot	txtdot	< 1.7.0

References

Advisories & Patches

https://github.com/TxtDot/txtdot/blob/a7fdaf80fdf45abefe83b2eb5135ba112142dc74/src/handlers/distributor.ts#L43-L47 https://github.com/TxtDot/txtdot/commit/7c72d985f7a26ec1fd3cf628444717ca54986d2d https://github.com/TxtDot/txtdot/blob/a7fdaf80fdf45abefe83b2eb5135ba112142dc74/src/handlers/distributor.ts#L43-L47 https://github.com/TxtDot/txtdot/commit/7c72d985f7a26ec1fd3cf628444717ca54986d2d

Exploits

https://github.com/TxtDot/txtdot/security/advisories/GHSA-4gj5-xj97-j8fp https://github.com/TxtDot/txtdot/security/advisories/GHSA-4gj5-xj97-j8fp

Frequently Asked Questions

What is CVE-2024-41812? +

txtdot is an HTTP proxy that parses only text, links, and pictures from pages, removing ads and heavy scripts. Prior to version 1.7.0, a Server-Side Request Forgery (SSRF) vulnerability in the `/get` route of txtdot allows remote attackers to use the server as a proxy to send HTTP GET requests to arbitrary targets and retrieve information in the internal network. Version 1.7.0 prevents displaying the response of forged requests, but the requests can still be sent. For complete mitigation, a firewall between txtdot and other internal network resources should be set. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-41812? +

CVE-2024-41812 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-41812? +

CVE-2024-41812 affects products from txtdot, specifically: txtdot. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-41812? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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