CVE-2024-21494 Authentication Bypass by Spoofing in github.com/greenpau/caddy-security
Attackers can bypass authentication by spoofing IP addresses via the X-Forwarded-For header in the Caddy security plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-21494?
CVE-2024-21494 is a medium-severity authentication bypass vulnerability in github.com/greenpau/caddy-security, published on 17 Feb 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
All versions of the package github.com/greenpau/caddy-security are vulnerable to Authentication Bypass by Spoofing via the X-Forwarded-For header due to improper input sanitization. An attacker can spoof an IP address used in the user identity module (/whoami API endpoint). This could lead to unauthorized access if the system trusts this spoofed IP address.
Which versions are affected by CVE-2024-21494?
3 open source packages ship an affected version, including github.com/greenpau/caddy-security. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/greenpau/caddy-security Go | All versions | None |
github.com/greenpau/caddy-security Go | All versions to 1.1.23 | None |
github.com/greenpau/caddy-security Go | All versions to 1.1.23 | None |
Products include Greenpau Caddy-Security.
How do I fix CVE-2024-21494?
No fix has been published for CVE-2024-21494 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2024-21494 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-21494 exists.
Other vulnerabilities in github.com/greenpau/caddy-security
- CVE-2024-21495 Use of Insufficiently Random Values in github.com/greenpau/caddy-security
- CVE-2024-21497 Open Redirect in github.com/greenpau/caddy-security
- CVE-2024-21493 Improper Validation of Array Index in github.com/greenpau/caddy-security
- CVE-2024-21499 Improper Neutralization of HTTP Headers in github.com/greenpau/caddy-security
Sources
Also known as GHSA-vj36-3ccr-6563, GO-2024-2558.