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Path traversal through symlinks for @backstage/backend-common

High
benjdlambert published GHSA-2fc9-xpp8-2g9h Feb 23, 2024

Package

npm @backstage/backend-common (npm)

Affected versions

= 0.21.0
< 0.19.10
>= 0.20.0, < 0.20.2

Patched versions

0.21.1
0.19.10
0.20.2

Description

Impact

Paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers.

Patches

Patched in @backstage/backend-common version 0.21.1.
Patched in @backstage/backend-common version 0.20.2.
Patched in @backstage/backend-common version 0.19.10.

For more information

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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
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
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:H/UI:N/S:C/C:H/I:H/A:N

CVE ID

CVE-2024-26150

Weaknesses

No CWEs