CVE-2023-28835

Insecure randomness for default password in nextcloud

Description

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.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.74% Top 30%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9 vendor advisory
https://github.com/nextcloud/server/pull/36093 patch issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-28835?
CVE-2023-28835 has been scored as a low severity vulnerability.
How to fix CVE-2023-28835?
To fix CVE-2023-28835, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28835 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28835 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28835?
CVE-2023-28835 affects nextcloud security-advisories.
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