What is the CVSS score of CVE-2020-15237?

CVE-2020-15237 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 1.0%.

Is there a patch available for CVE-2020-15237?

Yes, a patch is available for CVE-2020-15237. Update the affected software to the latest version immediately.

Shrine CVE-2020-15237

Q: Which versions of Shrine are affected by 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.. A patch is available.

MEDIUM

Observable Discrepancy (CWE-203)

2020-10-05 security-advisories@github.com

Information Disclosure Shrine

5.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Oct 05, 2020 - 19:15 nvd

MEDIUM 5.9

DescriptionNVD

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.

AnalysisAI

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. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.

Technical ContextAI

This vulnerability is classified under CWE-203. 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. Affected products include: Shrinerb Shrine. Version information: version 3.3.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.