CVE-2023-28835
Insecure randomness for default password in nextcloud
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2023-03-24 CVE Reserved
- 2023-03-30 CVE Published
- 2024-08-02 CVE Updated
- 2024-10-20 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CAPEC
References (2)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/nextcloud/server/pull/36093 | 2023-04-07 |
| URL | Date | SRC |
|---|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9 | 2023-04-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Nextcloud Search vendor "Nextcloud" | Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server" | >= 23.0.0 < 23.0.14 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 23.0.0 < 23.0.14" | enterprise |
Affected
| ||||||
| Nextcloud Search vendor "Nextcloud" | Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server" | >= 24.0.0 < 24.0.10 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 24.0.0 < 24.0.10" | - |
Affected
| ||||||
| Nextcloud Search vendor "Nextcloud" | Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server" | >= 24.0.0 < 24.0.10 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 24.0.0 < 24.0.10" | enterprise |
Affected
| ||||||
| Nextcloud Search vendor "Nextcloud" | Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server" | >= 25.0.0 < 25.0.4 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 25.0.0 < 25.0.4" | - |
Affected
| ||||||
| Nextcloud Search vendor "Nextcloud" | Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server" | >= 25.0.0 < 25.0.4 Search vendor "Nextcloud" for product "Nextcloud Server" and version " >= 25.0.0 < 25.0.4" | enterprise |
Affected
| ||||||