CVE-2020-28924

HIGH

rclone < 1.53.3 - Insufficient Entropy in Password Generator

Title source: llm
STIX 2.1

Description

An issue was discovered in Rclone before 1.53.3. Due to the use of a weak random number generator, the password generator has been producing weak passwords with much less entropy than advertised. The suggested passwords depend deterministically on the time the second rclone was started. This limits the entropy of the passwords enormously. These passwords are often used in the crypt backend for encryption of data. It would be possible to make a dictionary of all possible passwords with about 38 million entries per password length. This would make decryption of secret material possible with a plausible amount of effort. NOTE: all passwords generated by affected versions should be changed.

References (4)

Core 4
Core References
Vendor Advisory x_refsource_misc
https://rclone.org/downloads/
Exploit, Patch, Third Party Advisory x_refsource_misc
https://github.com/rclone/rclone/issues/4783
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202107-14

Scores

CVSS v3 7.5
EPSS 0.0134
EPSS Percentile 67.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-331 CWE-338
Status published
Products (3)
fedoraproject/fedora 33
rclone/rclone < 1.53.3
rclone/rclone 0 - 1.53.3Go
Published Nov 19, 2020
Tracked Since Feb 18, 2026