High severity · published Nov 19, 2020
CVE-2020-28924
An issue was discovered in Rclone before 1.53.3
7.5
CVSS
1.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33 · source: NVD
RC
Rclone · Rclone
before 1.53.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28924
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28924
Exploit
https://github.com/rclone/rclone/issues/4783
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJIFT24Q6EFXLQZ24AER2QGFFZLMIPCD/
Vendor Advisory
https://rclone.org/downloads/
Third Party Advisory
https://security.gentoo.org/glsa/202107-14
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