CVE-2020-28924

NameCVE-2020-28924
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
Debian Bugs975324

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rclone (PTS)stretch1.35-1fixed
stretch (security)1.35-1+deb8u1fixed
buster1.45-3fixed
bullseye1.53.1-2vulnerable
sid1.53.3-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rclonesourcestretch(not affected)
rclonesourcebuster(not affected)
rclonesource(unstable)1.53.3-1975324

Notes

[buster] - rclone <not-affected> (Vulnerable code introduced later)
[stretch] - rclone <not-affected> (Vulnerable code introduced later)
https://github.com/rclone/rclone/issues/4783
Introduced by: https://github.com/rclone/rclone/commit/193c30d57038017370594d5bc8ee9bc32580ddf2 (v1.49.0)
Fixed by: https://github.com/rclone/rclone/commit/7985df37681f54d013816a4641da4f9b085b3aa5 (master)
Fixed by: https://github.com/rclone/rclone/commit/f0905499e340f9e73e2552cf0c8b79cbf14ecbc4 (master)
Fixed by: https://github.com/rclone/rclone/commit/4c215cc81ec6143ae3c64633700cb341ca28df2d (v1.53.3)
Fixed by: https://github.com/rclone/rclone/commit/c8b11d27e1fe261fdfba6b8910fda69356c9c777 (v1.53.3)

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