CVE-2024-52521: nextcloud server — Fix

Description

Nextcloud Server is a self hosted personal cloud system. MD5 hashes were used to check background jobs for their uniqueness. This increased the chances of a background job with arguments falsely being identified as already existing and not be queued for execution. By changing the Hash to SHA256 the probability was heavily decreased. It is recommended that the Nextcloud Server is upgraded to 28.0.10, 29.0.7 or 30.0.0.

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CVSS v3.1 Score

2.6

LOW

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

Weakness Type (CWE)

CWE-328 CWE-328

Affected Products

Vendor	Product	Versions
nextcloud	nextcloud_server	28.0.0 — 28.0.10
nextcloud	nextcloud_server	28.0.0 — 28.0.10
nextcloud	nextcloud_server	29.0.0 — 29.0.7
nextcloud	nextcloud_server	29.0.0 — 29.0.7

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2q6f-gjgj-7hp4 https://github.com/nextcloud/server/commit/a933ba1fdba77e7d8c6b8ff400e082cf853ea46d

Other References

https://github.com/nextcloud/server/pull/47769

Frequently Asked Questions

What is CVE-2024-52521? +

Nextcloud Server is a self hosted personal cloud system. MD5 hashes were used to check background jobs for their uniqueness. This increased the chances of a background job with arguments falsely being identified as already existing and not be queued for execution. By changing the Hash to SHA256 the probability was heavily decreased. It is recommended that the Nextcloud Server is upgraded to 28.0.10, 29.0.7 or 30.0.0. It has a CVSS v3.1 base score of 2.6 (LOW).

How severe is CVE-2024-52521? +

CVE-2024-52521 has a CVSS v3.1 score of 2.6 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2024-52521? +

CVE-2024-52521 affects products from nextcloud, specifically: nextcloud_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-52521? +

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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