Description
In Shrine before version 3.3.0, when using the `derivation_endpoint` plugin, it's possible for the attacker to use a timing attack to guess the signature of the derivation URL. The problem has been fixed by comparing sent and calculated signature in constant time, using `Rack::Utils.secure_compare`. Users using the `derivation_endpoint` plugin are urged to upgrade to Shrine 3.3.0 or greater. A possible workaround is provided in the linked advisory.
Scores
CVSS v3
5.9
EPSS
0.0032
EPSS Percentile
54.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-208
CWE-203
Status
published
Products (2)
rubygems/shrine
0 - 3.3.0RubyGems
shrinerb/shrine
< 3.3.0
Published
Oct 05, 2020
Tracked Since
Feb 18, 2026