ShowDoc 2.8.14 before 3.9.6 Code Injection via Mock Templates

Summary

ShowDoc 2.8.14 before 3.9.6 contains a code injection vulnerability in its Mock feature that allows authenticated users to execute shell commands through mockjs templates. Attackers can store a template via MockController::add with escaped parentheses that mockjs evaluates with eval(), then trigger it through MockController::infoByKey to run commands, as root in the official Docker image.

Remediation

1. Inventory every ShowDoc ShowDoc deployment, including staging.
2. Upgrade ShowDoc ShowDoc to 3.9.6.
3. Confirm the running version after the upgrade.

References

• Patchhttps://github.com/star7th/showdoc/commit/5a2087a3f408f5266f61e9e2fb98845ef4788288
• Advisoryhttps://www.vulncheck.com/advisories/showdoc-2.8.14-before-3.9.6-code-injection-via-mock-templates
• Referencehttps://gist.github.com/LioTree/028af150fd991cf9924dd2c7d5912e54
• Referencehttps://github.com/star7th/showdoc/blob/v3.9.5/mock/index.js#L42
• Referencehttps://github.com/star7th/showdoc