CVE-2024-38353: codimd Weak RNG — Exploit

Description

CodiMD allows realtime collaborative markdown notes on all platforms. CodiMD before 2.5.4 is missing authentication and access control vulnerability allowing an unauthenticated attacker to gain unauthorised access to image data uploaded to CodiMD. CodiMD does not require valid authentication to access uploaded images or to upload new image data. An attacker who can determine an uploaded image's URL can gain unauthorised access to uploaded image data. Due to the insecure random filename generation in the underlying Formidable library, an attacker can determine the filenames for previously uploaded images and the likelihood of this issue being exploited is increased. This vulnerability is fixed in 2.5.4.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-338 CWE-338

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
hackmd	codimd	< 2.5.4

References

Exploits

https://github.com/hackmdio/codimd/security/advisories/GHSA-2764-jppc-p2hm https://github.com/hackmdio/codimd/security/advisories/GHSA-2764-jppc-p2hm

Frequently Asked Questions

What is CVE-2024-38353? +

CodiMD allows realtime collaborative markdown notes on all platforms. CodiMD before 2.5.4 is missing authentication and access control vulnerability allowing an unauthenticated attacker to gain unauthorised access to image data uploaded to CodiMD. CodiMD does not require valid authentication to access uploaded images or to upload new image data. An attacker who can determine an uploaded image's URL can gain unauthorised access to uploaded image data. Due to the insecure random filename generation in the underlying Formidable library, an attacker can determine the filenames for previously uploaded images and the likelihood of this issue being exploited is increased. This vulnerability is fixed in 2.5.4. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-38353? +

CVE-2024-38353 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-38353? +

CVE-2024-38353 affects products from hackmd, specifically: codimd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-38353? +

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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CVE-2024-38353