CVSS: 9.9EPSS: 0%CPEs: 1EXPL: 0CVE-2023-35926 – Insecure sandbox in Backstage Scaffolder plugin
https://notcve.org/view.php?id=CVE-2023-35926
Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. • https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a https://github.com/backstage/backstage/releases/tag/v1.15.0 https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr • CWE-94: Improper Control of Generation of Code ('Code Injection') •
CVSS: 8.5EPSS: 0%CPEs: 1EXPL: 0CVE-2021-43783 – Path Traversal in @backstage/plugin-scaffolder-backend
https://notcve.org/view.php?id=CVE-2021-43783
@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. • https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 6.8EPSS: 0%CPEs: 1EXPL: 0CVE-2021-41151 – Path Traversal in @backstage/plugin-scaffolder-backend
https://notcve.org/view.php?id=CVE-2021-41151
Backstage is an open platform for building developer portals. In affected versions A malicious actor could read sensitive files from the environment where Scaffolder Tasks are run. The attack is executed by crafting a custom Scaffolder template with a `github:publish:pull-request` action and a particular source path. When the template is executed the sensitive files would be included in the published pull request. This vulnerability is mitigated by the fact that an attacker would need access to create and register templates in the Backstage catalog, and that the attack is very visible given that the exfiltration happens via a pull request. • https://github.com/backstage/backstage/commit/6968962c920508eae19a4c1c200fa2c8980a4006 https://github.com/backstage/backstage/security/advisories/GHSA-pvv8-8fx9-h673 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •