7.5

CVE-2023-28835

Insecure randomness for default password in nextcloud

Insecure randomness for default password in file sharing when password policy app is disabled

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.
Mögliche Gegenmaßnahme
Server: * Enable password policy app * Overwrite the default password when creating a share
Enterprise Server: * Enable password policy app * Overwrite the default password when creating a share
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 23.0.0 < 23.0.14
Nextcloud ≫ Nextcloud Server SwEdition- Version >= 24.0.0 < 24.0.10
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 24.0.0 < 24.0.10
Nextcloud ≫ Nextcloud Server SwEdition- Version >= 25.0.0 < 25.0.4
Nextcloud ≫ Nextcloud Server SwEditionenterprise Version >= 25.0.0 < 25.0.4
VulnDex Vulnerability Enrichment
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Weitere Schwachstelleninformationen
SystemNextcloud
≫
Produkt Server
Version >= 24.0.0, < 24.0.10
Version >= 25.0.0, < 25.0.4
SystemNextcloud
≫
Produkt Enterprise Server
Version >= 23.0.0, < 23.0.14
Version >= 24.0.0, < 24.0.10
Version >= 25.0.0, < 25.0.4
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.31% 0.54
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
security-advisories@github.com 3.5 2.1 1.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.