CVE-2021-43783

描述

### Impact 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. ### Patches This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. ### Workarounds This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates. ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Backstage repository](https://github.com/backstage/backstage) * Visit our chat, linked to in [Backstage README](https://github.com/backstage/backstage)

如何修補 CVE-2021-43783

要修補 CVE-2021-43783,請將受影響套件升級到下列已修補版本。

• —升級至 0.15.14 或更新版本

CVE-2021-43783 正在被利用嗎?

低 — EPSS 為 1.2%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 0.15.14

CVSS 分數

參考連結(4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-43783
• PATCHgithub.com/backstage/backstage
• WEBgithub.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f
• WEBgithub.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv