`@backstage/backend-common` vulnerable to path traversal through symlinks

2024-02-2318:02:08

Google

osv.dev

path traversal

symlinks

resolvesafechildpath

patch

version 0.21.1

version 0.20.2

version 0.19.10

backstage repository

discord

CVSS3

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.9

Confidence

Low

EPSS

Percentile

15.5%

JSON

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.