Vulnerability in Gofiber Fiber
CVE-2023-41338
Fiber is an Express inspired web framework built in the go language. Versions of gofiber prior to 2.49.2 did not properly restrict access to localhost. This issue impacts users of our project who rely on the `ctx.IsFromLocal` method to restrict access to localhost requests. If exploited, it could allow unauthorized access to resources intended only for localhost. Setting `X-Forwarded-For: 127.0.0.1` in a request from a foreign host, will result in true for `ctx.IsFromLocal`. Access is limited to the scope of the affected process. This issue has been patched in version `2.49.2` with commit `b8c9ede6`. Users are advised to upgrade. There are no known workarounds to remediate this vulnerability without upgrading to the patched version.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.001
Affected products
- Gofiber Fiber — versions < 2.49.2
Weakness classification (CWE)
References
- github.com/gofiber/fiber/security/advisories/GHSA-3q5p-3558-364f (Vendor Advisory)
- github.com/gofiber/fiber/commit/b8c9ede6efa231116c4bd8bb9d5e03eac1cb76dc (Patch)
- developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For (Technical Description)
- docs.gofiber.io/api/ctx (Product)
Frequently asked questions
- What is CVE-2023-41338?
- CVE-2023-41338 is a medium-severity vulnerability in Gofiber Fiber, classified under Always-Incorrect Control Flow Implementation. CVSS score: 5.3/10. Published 2023-09-08.
- How severe is CVE-2023-41338?
- Medium severity. CVSS v3 base score is 5.3 out of 10.