CVE-2023-22491 – gatsby-transformer-remark

Package

Manager: npm
Name: gatsby-transformer-remark
Vulnerable Version: >=6.0.0 <6.3.2 || >=0 <5.25.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00136 pctl0.34076

Details

gatsby-transformer-remark has possible unsanitized JavaScript code injection ### Impact The gatsby-transformer-remark plugin prior to versions 5.25.1 and 6.3.2 passes input through to the `gray-matter` npm package, which is vulnerable to JavaScript injection in its default configuration, unless input is sanitized. The vulnerability is present in gatsby-transformer-remark when passing input in data mode (querying MarkdownRemark nodes via GraphQL). Injected JavaScript executes in the context of the build server. To exploit this vulnerability untrusted/unsanitized input would need to be sourced by or added into a file processed by gatsby-transformer-remark. The following payload demonstrates a vulnerable configuration: ``` ---js ((require("child_process")).execSync("id >> /tmp/rce")) --- ``` ### Patches A patch has been introduced in `gatsby-transformer-remark@5.25.1` and `gatsby-transformer-remark@6.3.2` which mitigates the issue by disabling the `gray-matter` JavaScript Frontmatter engine. The patch introduces a new option, `JSFrontmatterEngine` which is set to `false` by default. When setting `JSFrontmatterEngine` to `true`, input passed to `gatsby-plugin-mdx` must be sanitized before processing to avoid a security risk. Warnings are displayed when enabling `JSFrontmatterEngine` to `true` or if it appears that the MarkdownRemark input is attempting to use the Frontmatter engine. ### Workarounds If an older version of `gatsby-transformer-remark` must be used, input passed into the plugin should be sanitized ahead of processing. **We encourage projects to upgrade to the latest major release branch for all Gatsby plugins to ensure the latest security updates and bug fixes are received in a timely manner.** ### For more information Email us at [security@gatsbyjs.com](mailto:security@gatsbyjs.com).

Metadata

Created: 2023-01-11T18:27:15Z
Modified: 2023-01-23T18:42:36Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/01/GHSA-7ch4-rr99-cqcw/GHSA-7ch4-rr99-cqcw.json
CWE IDs: ["CWE-20", "CWE-79"]
Alternative ID: GHSA-7ch4-rr99-cqcw
Finding: F425
Auto approve: 1