CVE-2020-15237
low-risk
Published 2020-10-05
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.
Do I need to act?
-
0.32% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10
Medium
NETWORK
/ HIGH complexity
Affected Products (1)
Shrine
Affected Vendors
References (4)
Third Party Advisory
https://github.com/shrinerb/shrine/security/advisories/GHSA-5jjv-x4fq-qjwp
Third Party Advisory
https://github.com/shrinerb/shrine/security/advisories/GHSA-5jjv-x4fq-qjwp
24
/ 100
low-risk
Severity
18/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal