Medium severity · published Aug 4, 2022
CVE-2022-31118
Missing brute force protection on cloud federation sharing in Nextcloud Server
5.3
CVSS
0.8%
EPSS
No
On KEV
Description
Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the Nextcloud Server is upgraded to 22.2.9, 23.0.6 or 24.0.2. Users unable to upgrade may disable federated sharing via the Admin Sharing settings in `index.php/settings/admin/sharing`.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · nextcloud
< 22.2.9; >= 23.0.0, < 23.0.6; >= 24.0.0, < 24.0.2 · source: vendor
NS
Nextcloud Server · Nextcloud
before 22.2.9; 23.0.0 before 23.0.6; 24.0.0 before 24.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-31118
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-31118
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vwh-5v93-3vcq
Patch
https://github.com/nextcloud/server/pull/32843/commits/6eb692da7fe73c899cb6a8d2aa045eddb1f14018
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