CVE-2023-46740: cubefs Use of Insufficiently Random Values

Vulnerability summary

CVE-2023-46740 is a critical (CVSS 9.8) Use of Insufficiently Random Values vulnerability in cubefs. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.8% of scored vulnerabilities.

Timeline

1. 03-01-2024
   PublishedVulnerability first disclosed.
2. 17-06-2025
   Last modifiedVulnerability information updated.

Description

CubeFS is an open-source cloud-native file storage system. Prior to version 3.3.1, CubeFS used an insecure random string generator to generate user-specific, sensitive keys used to authenticate users in a CubeFS deployment. This could allow an attacker to predict and/or guess the generated string and impersonate a user thereby obtaining higher privileges. When CubeFS creates new users, it creates a piece of sensitive information for the user called the “accessKey”. To create the "accesKey", CubeFS uses an insecure string generator which makes it easy to guess and thereby impersonate the created user. An attacker could leverage the predictable random string generator and guess a users access key and impersonate the user to obtain higher privileges. The issue has been fixed in v3.3.1. There is no other mitigation than to upgrade.

• CWE-330Use of Insufficiently Random ValuesThe product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.