Vulnerability in Rclone
CVE-2020-28924
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (70.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000
Affected products
- Rclone
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
References
- rclone.org/downloads/ (Vendor Advisory)
- github.com/rclone/rclone/issues/4783 (Exploit, Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202107-14 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-28924?
- CVE-2020-28924 is a high-severity vulnerability in Rclone, classified under Insufficient Entropy. CVSS score: 7.5/10. Published 2020-11-19.
- How severe is CVE-2020-28924?
- High severity. CVSS v3 base score is 7.5 out of 10.