CVE-2020-15237 (GCVE-0-2020-15237)
Vulnerability from cvelistv5
Published
2020-10-05 18:30
Modified
2024-08-04 13:08
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-208 - {"":"Observable Timing Discrepancy"}
  • CWE-203 - {"":"Observable Differences in Behavior to Error Inputs"}
Summary
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.
References
Impacted products
Vendor Product Version
shrinerb shrine Version: < 3.3.0
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