CVE-2024-21496

Summary

All versions of the package github.com/greenpau/caddy-security are vulnerable to Cross-site Scripting (XSS) via the Referer header, due to improper input sanitization. Although the Referer header is sanitized by escaping some characters that can allow XSS (e.g., [&], [<], [>], ["], [']), it does not account for the attack based on the JavaScript URL scheme (e.g., javascript:alert(document.domain)// payload). Exploiting this vulnerability may not be trivial, but it could lead to the execution of malicious scripts in the context of the target user’s browser, compromising user sessions.

Affected Software

Weaknesses

• CWE-79: Cross-site Scripting (XSS)

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

CVE Program Container

Additional References

• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860
• https://github.com/greenpau/caddy-security/issues/267
• https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/

References

• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249860
• https://github.com/greenpau/caddy-security/issues/267
• https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/

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