CVE-2020-28924

medium

Published 2021-06-10 · Modified 2026-03-03

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CVSS v3

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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v4 NEW

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not yet in upstream

VIR risk

5.5

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.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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OS impact

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`1.53.3-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1.53.3-1`
sid	Fixed	`1.53.3-1`
forky	Fixed	`1.53.3-1`
bullseye	Fixed	`1.53.3-1`
bookworm	Fixed	`1.53.3-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/rclone/rclone	`<1.53.3`	`1.53.3`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.