CVE-2024-34361: pi-hole SSRF — Exploit & Fix

Description

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. A vulnerability in versions prior to 5.18.3 allows an authenticated user to make internal requests to the server via the `gravity_DownloadBlocklistFromUrl()` function. Depending on some circumstances, the vulnerability could lead to remote command execution. Version 5.18.3 contains a patch for this issue.

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CVSS v3.1 Score

8.5

HIGH

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

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
pi-hole	pi-hole	< 5.18.3

References

Advisories & Patches

https://github.com/pi-hole/pi-hole/commit/2c497a9a3ea099079bbcd1eb21725b0ed54b529d https://github.com/pi-hole/pi-hole/security/advisories/GHSA-jg6g-rrj6-xfg6 https://github.com/pi-hole/pi-hole/commit/2c497a9a3ea099079bbcd1eb21725b0ed54b529d https://github.com/pi-hole/pi-hole/security/advisories/GHSA-jg6g-rrj6-xfg6

Exploits

https://github.com/pi-hole/pi-hole/security/advisories/GHSA-jg6g-rrj6-xfg6 https://github.com/pi-hole/pi-hole/security/advisories/GHSA-jg6g-rrj6-xfg6

Frequently Asked Questions

What is CVE-2024-34361? +

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. A vulnerability in versions prior to 5.18.3 allows an authenticated user to make internal requests to the server via the `gravity_DownloadBlocklistFromUrl()` function. Depending on some circumstances, the vulnerability could lead to remote command execution. Version 5.18.3 contains a patch for this issue. It has a CVSS v3.1 base score of 8.5 (HIGH).

How severe is CVE-2024-34361? +

CVE-2024-34361 has a CVSS v3.1 score of 8.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-34361? +

CVE-2024-34361 affects products from pi-hole, specifically: pi-hole. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-34361? +

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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