CVE-2024-42987: fh1206 Memory Corruption — Exploit

Description

Tenda FH1206 v02.03.01.35 was discovered to contain a stack-based buffer overflow vulnerability in the fromPptpUserAdd function. The vulnerability can be triggered via the modino, username, newpwd, or pptpdnetseg parameters, all of which are passed via HTTP POST and used in unsafe sprintf calls without proper length validation. A remote attacker can exploit this flaw through a crafted POST request, which may cause a Denial of Service (DoS). In certain scenarios, this issue could potentially be leveraged to achieve remote code execution.

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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:N/I:N/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
tenda	fh1206_firmware	All
tenda	fh1206	All

References

Exploits

https://github.com/TTTJJJWWW/AHU-IoT-vulnerable/blob/main/Tenda/FH1206/fromPptpUserAdd.md

Other References

https://github.com/laohouzju/PoC/blob/main/Tenda%20FH1206%20fromPptpUserAdd_newpwd.md https://github.com/laohouzju/PoC/blob/main/Tenda%20FH1206%20fromPptpUserAdd_pptpdnetseg.md https://github.com/laohouzju/PoC/blob/main/Tenda%20FH1206%20fromPptpUserAdd_username.md

Frequently Asked Questions

What is CVE-2024-42987? +

Tenda FH1206 v02.03.01.35 was discovered to contain a stack-based buffer overflow vulnerability in the fromPptpUserAdd function. The vulnerability can be triggered via the modino, username, newpwd, or pptpdnetseg parameters, all of which are passed via HTTP POST and used in unsafe sprintf calls without proper length validation. A remote attacker can exploit this flaw through a crafted POST request, which may cause a Denial of Service (DoS). In certain scenarios, this issue could potentially be leveraged to achieve remote code execution. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-42987? +

CVE-2024-42987 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-2024-42987? +

CVE-2024-42987 affects products from tenda, specifically: fh1206, fh1206_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-42987? +

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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