rclone: CVE-2020-28924: generating weak passwords

Debian Bug report logs - #975324
rclone: CVE-2020-28924: generating weak passwords

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: rclone: CVE-2020-28924: generating weak passwords

Date: Fri, 20 Nov 2020 14:54:31 +0100

Source: rclone
Version: 1.53.1-2
Severity: grave
Tags: security upstream
Justification: user security hole
Forwarded: https://github.com/rclone/rclone/issues/4783
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for rclone.

CVE-2020-28924[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2020-28924
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28924
[1] https://github.com/rclone/rclone/issues/4783

Regards,
Salvatore

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