Insecure random string generator used for sensitive data

published 2024-01-03 2 y ago modified 2026-09-10 1 mo ago also GHSA-4248-p65p-hcrm , GO-2024-2431 , EUVD-2024-0236

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

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.

Patch / fix

fixed in 2 links 1

go github.com/cubefs/cubefs 3.3.1
linuxfoundation cubefs 3.3.1

github.com/cubefs/cubefs@8555c64 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-01-11)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
go	github.com/cubefs/cubefs	<3.3.1 all versions	3.3.1

Affected products

cubefs cubefs

Classification

Weakness

CWE-330 Use of Insufficiently Random Values

References

github.com /cubefs/cubefs/commit/8555c6402794cabdf2cc025c8bea1576122c07ba
web, patch
github.com /cubefs/cubefs/security/advisories/GHSA-4248-p65p-hcrm
web, third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2023-46740
advisory
github.com /cubefs/cubefs
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary