Medium severity · published Nov 15, 2024
CVE-2024-52521
Nextcloud Server has a potential hash collision for background jobs could skip queuing them
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · nextcloud
>= 28.0.0, < 28.0.10; >= 29.0.0, < 29.0.7 · source: vendor
NS
Nextcloud Server · Nextcloud
28.0.0 before 28.0.10; 28.0.0 before 28.0.10; 29.0.0 before 29.0.7; 29.0.0 before 29.0.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-52521
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-52521
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2q6f-gjgj-7hp4
Patch
https://github.com/nextcloud/server/commit/a933ba1fdba77e7d8c6b8ff400e082cf853ea46d
Issue Tracking
https://github.com/nextcloud/server/pull/47769
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