CVE-2018-20744 github.com/gofiber/fiber/v2 vulnerable to Origin Validation Error
The Go CORS handler library incorrectly reflects arbitrary Origin headers when wildcard policies are used, allowing attackers to bypass CORS restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-20744?
CVE-2018-20744 is a medium-severity vulnerability in n/a, published on 28 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.
Weakness: CWE-346
Which versions are affected by CVE-2018-20744?
5 open source packages ship an affected version, including github.com/rs/cors and github.com/gofiber/fiber/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rs/cors Go | All versions | 1.5.0 |
github.com/rs/cors Go | All versions | 1.5.0 |
github.com/rs/cors Go | All versions | 1.5.0 |
github.com/gofiber/fiber/v2 Go | From 2.0.0 | 2.43.0 |
github.com/gofiber/fiber/v2 Go | From 2.0.0 | 2.43.0 |
Products include Go Cors Project Go Cors.
How do I fix CVE-2018-20744?
Upgrade github.com/rs/cors to 1.5.0 or later.
Is CVE-2018-20744 being exploited?
There is no known exploitation of CVE-2018-20744 in the wild and no public exploit code.
Sources
Also known as GHSA-927h-x4qj-r242, GO-2023-1792.