CVE-2024-26150 `@backstage/backend-common` vulnerable to path traversal through symlinks
Attackers can exploit symlink injection to bypass path checks in Backstage backend libraries, potentially reading or modifying unauthorized files.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-26150?
CVE-2024-26150 is a high-severity path traversal vulnerability in backstage, published on 23 Feb 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
`@backstage/backend-common` is a common functionality library for backends for Backstage, an open platform for building developer portals. In `@backstage/backend-common` prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the `resolveSafeChildPath` utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in `@backstage/backend-common` versions 0.21.1, 0.20.2, and 0.19.10.
Weakness: CWE-22
Which versions are affected by CVE-2024-26150?
6 open source packages ship an affected version, including @backstage/backend-common. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@backstage/backend-common npm | All versions | 0.19.10 |
@backstage/backend-common npm | All versions | 0.19.10 |
@backstage/backend-common npm | From 0.20.0 | 0.20.2 |
@backstage/backend-common npm | From 0.20.0 | 0.20.2 |
@backstage/backend-common npm | From 0.21.0 | 0.21.1 |
@backstage/backend-common npm | From 0.21.0 | 0.21.1 |
Products include Linuxfoundation Backstage Backend-Common.
How do I fix CVE-2024-26150?
Upgrade @backstage/backend-common to a fixed version for your release line: 0.19.10, 0.20.2 or 0.21.1.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2024-26150 being exploited?
There is no known exploitation of CVE-2024-26150 in the wild and no public exploit code.
Sources
Also known as GHSA-2fc9-xpp8-2g9h.