CVE-2020-15237

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.

CVSS v3 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/shrinerb/shrine/commit/1b27090ce31543bf39f186c20ea47c8250fca2f0	Patch Third Party Advisory
https://github.com/shrinerb/shrine/security/advisories/GHSA-5jjv-x4fq-qjwp	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:shrinerb:shrine:*:*:*:*:*:ruby:*:*

History

No history.

Information

Published : 2020-10-05 19:15

Updated : 2024-02-28 18:08

NVD link : CVE-2020-15237

Mitre link : CVE-2020-15237

CVE.ORG link : CVE-2020-15237

JSON object : View

Products Affected

shrinerb

shrine

CWE

CWE-203

Observable Discrepancy

CWE-208

Observable Timing Discrepancy

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