#VU48568 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)


Published: 2020-11-19 | Updated: 2020-11-20

Vulnerability identifier: #VU48568

Vulnerability risk: Low

CVSSv3: 3.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28924

CWE-ID: CWE-338

Exploitation vector: Network

Exploit availability: No

Vulnerable software: rclone
Other software / Other software solutions

Vendor: rclone.org

Description

The vulnerability allows an attacker to decrypt or brute-force passwords.

The vulnerability exists due to Rclone uses a weak random number generator for generating passwords with much less entropy than advertised. An attacker, who is able to obtain the password protected file can decrypt data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

rclone: 1.49.0, 1.49.1, 1.49.2, 1.49.3, 1.49.4, 1.49.5, 1.50.0, 1.50.1, 1.50.2, 1.51.0, 1.52.0, 1.52.1, 1.52.2, 1.52.3, 1.53.0, 1.53.1, 1.53.2

CPE

External links
https://github.com/rclone/rclone/issues/4783
https://rclone.org/downloads/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


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