Medium severity · published Jun 23, 2023
CVE-2023-35173
Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously dropped files inaccessible. It is recommended that the Nextcloud End-to-end encryption app is upgraded to version 1.12.4 that contains the fix.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EE
End-to-end Encryption · Nextcloud
1.12.0 before 1.12.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-35173
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-35173
Patch
https://github.com/nextcloud/end_to_end_encryption/pull/435
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x7c7-v5r3-mg37
Third Party Advisory
https://hackerone.com/reports/1914115
More from End-to-end Encryption
6.5
CVE-2021-22906
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users