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rack-protection gem timing attack vulnerability when validating CSRF token

Moderate severity GitHub Reviewed Published Mar 7, 2018 to the GitHub Advisory Database • Updated Aug 29, 2023

Package

bundler rack-protection (RubyGems)

Affected versions

< 1.5.5
>= 2.0.0.beta1, <= 2.0.0.rc3

Patched versions

1.5.5
2.0.0

Description

Sinatra rack-protection versions 1.5.4 and 2.0.0.rc3 and earlier contains a timing attack vulnerability in the CSRF token checking that can result in signatures can be exposed. This attack appear to be exploitable via network connectivity to the ruby application. This vulnerability appears to have been fixed in 1.5.5 and 2.0.0.

References

Published to the GitHub Advisory Database Mar 7, 2018
Reviewed Jun 16, 2020
Last updated Aug 29, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.180%
(56th percentile)

Weaknesses

CVE ID

CVE-2018-1000119

GHSA ID

GHSA-688c-3x49-6rqj

Source code

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