CVE-2023-28835
Published: 30 March 2023
Summary
CVE-2023-28835 is a low-severity PRNG (CWE-338) vulnerability in Nextcloud Nextcloud Server. Its CVSS base score is 3.5 (Low).
Operationally, ranked in the top 50.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-32467
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security associations share details on cryptographically weak PRNGs, helping avoid their implementation in security-critical functions.
Cryptographic key management standards require cryptographically strong PRNGs for key material, blocking use of weak generators.