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sinatra does not validate expanded path matches

High severity GitHub Reviewed Published May 3, 2022 to the GitHub Advisory Database • Updated May 4, 2023

Package

bundler sinatra (RubyGems)

Affected versions

< 2.2.0

Patched versions

2.2.0

Description

Sinatra before 2.2.0 does not validate that the expanded path matches public_dir when serving static files.

References

Published by the National Vulnerability Database May 2, 2022
Published to the GitHub Advisory Database May 3, 2022
Reviewed May 3, 2022
Last updated May 4, 2023

Severity

High

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

EPSS score

0.228%
(61st percentile)

Weaknesses

CVE ID

CVE-2022-29970

GHSA ID

GHSA-qp49-3pvw-x4m5

Source code

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