CVE-2020-28924

HIGH EPSS 67.7%
Published Nov 19, 20205y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 19, 2020 5y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
67.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-331
CWE-338

Affected Products 2

VendorProductVersionRange
rclonerclone* <1.53.3
fedoraprojectfedora33any

References 4

  • github.com https://github.com/rclone/rclone/issues/4783
    ExploitPatchThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJIFT24Q6EFXLQZ24AER2QGFFZLMIPCD/
  • rclone.org https://rclone.org/downloads/
    Vendor Advisory
  • security.gentoo.org https://security.gentoo.org/glsa/202107-14
    Third Party Advisory

Remediation

  • github.com https://github.com/rclone/rclone/issues/4783
    ExploitPatchThird Party Advisory