🐛 [BUG]: CORS panic with AcceptOrigins with whitespace #2882

sixcolors · 2024-02-26T19:42:19Z

This looks like a bug to me.

will confirm shortly.

Originally posted by @sixcolors in #2881 (review)

Example code:

package main

import (
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
)

func main() {
	app := fiber.New()

	app.Use(cors.New(
		cors.Config{
			AllowOrigins: "http://first-url.com, http://second-url.com",
			AllowHeaders: "Origin, Content-Type, Accept",
		},
	))

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("Hello, World 👋!")
	})

	app.Listen(":3000")
}

/*
To test the CORS policy, add the following lines to /etc/hosts:

127.0.0.1 first-url.com
127.0.0.1 second-url.com

then you can use the following curl command:

curl -H "Origin: http://first-url.com" \
     -H "Access-Control-Request-Method: GET" \
     -H "Access-Control-Request-Headers: Origin, Content-Type, Accept" \
     -X OPTIONS --verbose \
     http://localhost:3000
*/

output:

2024/02/26 14:53:41.612331 cors.go:125: [Warn] [CORS] Invalid origin format in configuration:  http://second-url.com
panic: [CORS] Invalid origin provided in configuration

Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes gofiber#2882

* fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks

gaby · 2024-03-01T12:19:33Z

Fixed via #2883

* fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks (cherry picked from commit d456e7d)

* fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes gofiber#2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks (cherry picked from commit d456e7d)

* fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks * fix(middleware/cors): handling and wildcard subdomain matching docs(middleware/cors): add How it works and Security Considerations * chore: grammar * Apply suggestions from code review Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * chore: fix misspelling * test(middleware/cors): combine Invalid_Origins tests * refactor(middleware/cors): headers handling * docs(middleware/cors): Update AllowOrigins description * chore: merge * perf(middleware/cors): optimize handler * perf(middleware/cors): optimize handler * chore(middleware/cors): ipdate origin handling logic * chore(middleware/cors): fix header capitalization * docs(middleware/cors): improve sercuity notes * docs(middleware/cors): Improve security notes * docs(middleware/cors): improve CORS overview * docs(middleware/cors): fix ordering of how it works * docs(middleware/cors): add additional info to How to works * docs(middleware/cors): rm space * docs(middleware/cors): add validation for AllowOrigins origins to overview * docs(middleware/cors): update ExposeHeaders and MaxAge descriptions * docs(middleware/cors): Add dynamic origin validation example * docs(middleware/cors): Improve security notes and fix header capitalization * docs(middleware/cors): configuration examples * docs(middleware/cors): `"*"` --------- Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

…er#2915) * fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes gofiber#2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks * fix(middleware/cors): handling and wildcard subdomain matching docs(middleware/cors): add How it works and Security Considerations * chore: grammar * Apply suggestions from code review Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * chore: fix misspelling * test(middleware/cors): combine Invalid_Origins tests * refactor(middleware/cors): headers handling * docs(middleware/cors): Update AllowOrigins description * chore: merge * perf(middleware/cors): optimize handler * perf(middleware/cors): optimize handler * chore(middleware/cors): ipdate origin handling logic * chore(middleware/cors): fix header capitalization * docs(middleware/cors): improve sercuity notes * docs(middleware/cors): Improve security notes * docs(middleware/cors): improve CORS overview * docs(middleware/cors): fix ordering of how it works * docs(middleware/cors): add additional info to How to works * docs(middleware/cors): rm space * docs(middleware/cors): add validation for AllowOrigins origins to overview * docs(middleware/cors): update ExposeHeaders and MaxAge descriptions * docs(middleware/cors): Add dynamic origin validation example * docs(middleware/cors): Improve security notes and fix header capitalization * docs(middleware/cors): configuration examples * docs(middleware/cors): `"*"` --------- Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* fix(middleware/cors): Handling and wildcard subdomain matching (#2915) * fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks * fix(middleware/cors): handling and wildcard subdomain matching docs(middleware/cors): add How it works and Security Considerations * chore: grammar * Apply suggestions from code review Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * chore: fix misspelling * test(middleware/cors): combine Invalid_Origins tests * refactor(middleware/cors): headers handling * docs(middleware/cors): Update AllowOrigins description * chore: merge * perf(middleware/cors): optimize handler * perf(middleware/cors): optimize handler * chore(middleware/cors): ipdate origin handling logic * chore(middleware/cors): fix header capitalization * docs(middleware/cors): improve sercuity notes * docs(middleware/cors): Improve security notes * docs(middleware/cors): improve CORS overview * docs(middleware/cors): fix ordering of how it works * docs(middleware/cors): add additional info to How to works * docs(middleware/cors): rm space * docs(middleware/cors): add validation for AllowOrigins origins to overview * docs(middleware/cors): update ExposeHeaders and MaxAge descriptions * docs(middleware/cors): Add dynamic origin validation example * docs(middleware/cors): Improve security notes and fix header capitalization * docs(middleware/cors): configuration examples * docs(middleware/cors): `"*"` --------- Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * test(middleware/cors): improve test coverage for request types * chore(middleware/cors): fix v2 merge issues * test(middleware/cors): Add subdomain matching tests * fix(middleware/cors): Update Next function signature * test(middleware/cors): Add benchmark for CORS subdomain matching * test(middleware/cors): cover additiona test cases * refactor(middleware/cors): origin validation and normalization --------- Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Update pull_request_template.md * Update v3-changes.md * Update CONTRIBUTING.md (#2752) Grammar correction. * chore(encryptcookie)!: update default config (#2753) * chore(encryptcookie)!: update default config docs(encryptcookie): enhance documentation and examples BREAKING CHANGE: removed the hardcoded "csrf_" from the Except. * docs(encryptcookie): reads or modifies cookies * chore(encryptcookie): csrf config example * docs(encryptcookie): md table spacing * build(deps): bump actions/setup-go from 4 to 5 (#2754) Bumps [actions/setup-go](https://github.com/actions/setup-go) from 4 to 5. - [Release notes](https://github.com/actions/setup-go/releases) - [Commits](actions/setup-go@v4...v5) --- updated-dependencies: - dependency-name: actions/setup-go dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> * 🩹 middleware/logger/: log client IP address by default (#2755) * middleware/logger: Log client IP address by default. * Update doc. * fix: don't constrain middlewares' context-keys to strings 🐛 (#2751) * Revert "Revert ":bug: requestid.Config.ContextKey is interface{} (#2369)" (#2742)" This reverts commit 28be17f. * fix: request ContextKey default value condition Should check for `nil` since it is `any`. * fix: don't constrain middlewares' context-keys to strings `context` recommends using "unexported type" as context keys to avoid collisions https://pkg.go.dev/github.com/gofiber/fiber/v2#Ctx.Locals. The official go blog also recommends this https://go.dev/blog/context. `fiber.Ctx.Locals(key any, value any)` correctly allows consumers to use unexported types or e.g. strings. But some fiber middlewares constrain their context-keys to `string` in their "default config structs", making it impossible to use unexported types. This PR removes the `string` _constraint_ from all middlewares, allowing to now use unexported types as per the official guidelines. However the default value is still a string, so it's not a breaking change, and anyone still using strings as context keys is not affected. * 📚 Update app.md for indentation (#2761) Update app.md for indentation * build(deps): bump github.com/google/uuid from 1.4.0 to 1.5.0 (#2762) Bumps [github.com/google/uuid](https://github.com/google/uuid) from 1.4.0 to 1.5.0. - [Release notes](https://github.com/google/uuid/releases) - [Changelog](https://github.com/google/uuid/blob/master/CHANGELOG.md) - [Commits](google/uuid@v1.4.0...v1.5.0) --- updated-dependencies: - dependency-name: github.com/google/uuid dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> * build(deps): bump github/codeql-action from 2 to 3 (#2763) Bumps [github/codeql-action](https://github.com/github/codeql-action) from 2 to 3. - [Release notes](https://github.com/github/codeql-action/releases) - [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md) - [Commits](github/codeql-action@v2...v3) --- updated-dependencies: - dependency-name: github/codeql-action dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> * Changing default log output (#2730) changing default log output Closes #2729 * Update hooks.md fix wrong hooks signature * 🩹 Fix: CORS middleware should use the defined AllowedOriginsFunc config when AllowedOrigins is empty (#2771) * 🐛 [Bug]: Adaptator + otelfiber issue #2641 (#2772) * 🩹🚨 - fix for redirect with query params (#2748) * redirect with query params did not work, fix it and add test for it * redirect middleware - fix test typo * ♻️ logger/middleware colorize logger error message #2593 (#2773) * ✨ feat: add liveness and readiness checks (#2509) * ✨ feat: add liveness and readiness checkers * 📝 docs: add docs for liveness and readiness * ✨ feat: add options method for probe checkers * ✅ tests: add tests for liveness and readiness * ♻️ refactor: change default endpoint values * ♻️ refactor: change default value for liveness endpoint * 📝 docs: add return status for liveness and readiness probes * ♻️ refactor: change probechecker to middleware * 📝 docs: move docs to middleware session * ♻️ refactor: apply gofumpt formatting * ♻️ refactor: remove unused parameter * split config and apply a review * apply reviews and add testcases * add benchmark * cleanup * rename middleware * fix linter * Update docs and config values * Revert change to IsReady * Updates based on code review * Update docs to match other middlewares --------- Co-authored-by: Muhammed Efe Cetin <[email protected]> Co-authored-by: Juan Calderon-Perez <[email protected]> Co-authored-by: Juan Calderon-Perez <[email protected]> * prepare release v2.52.0 - add more Parser tests * fix healthcheck.md * configure workflows for V2 branch * configure workflows for V2 branch * Fix default value to false in docs of QueryBool (#2811) fix default value to false in docs of QueryBool * update queryParser config * Update ctx.md * Update routing.md * 📚 Doc: Fix code snippet indentation in /docs/api/middleware/keyauth.md Removes an an extra level of indentation in line 51 of `keyauth.md` [here](https://github.com/gofiber/fiber/blob/v2/docs/api/middleware/keyauth.md?plain=1#L51) * fix: healthcheck middleware not working with route group (#2863) * fix: healthcheck middleware not working with route group * perf: change verification method to improve perf * Update healthcheck_test.go * test: add not matching route test for strict routing * add more test cases * correct tests * correct test helpers * correct tests * correct tests --------- Co-authored-by: Juan Calderon-Perez <[email protected]> Co-authored-by: René Werner <[email protected]> * Merge pull request from GHSA-fmg4-x8pw-hjhg * Enforce Wildcard Origins with AllowCredentials check * Expand unit-tests, fix issues with subdomains logic, update docs * Update cors.md * Added test using localhost, ipv4, and ipv6 address * improve documentation markdown --------- Co-authored-by: René Werner <[email protected]> * Update app.go prepare release v2.52.1 * fix cors domain normalize * fix sync-docs workflow * fix sync-docs workflow * fix(middleware/cors): Validation of multiple Origins (#2883) * fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks * prepare release v2.52.2 * refactor(docs): deactivate docs sync for v2 * refactor(docs): deactivate docs sync for v2 * fix(middleware/cors): Handling and wildcard subdomain matching (#2915) * fix: allow origins check Refactor CORS origin validation and normalization to trim leading or trailing whitespace in the cfg.AllowOrigins string [list]. URLs with whitespace inside the URL are invalid, so the normalizeOrigin will return false because url.Parse will fail, and the middleware will panic. fixes #2882 * test: AllowOrigins with whitespace * test(middleware/cors): add benchmarks * chore: fix linter errors * test(middleware/cors): use h() instead of app.Test() * test(middleware/cors): add miltiple origins in Test_CORS_AllowOriginScheme * chore: refactor validate and normalize * test(cors/middleware): add more benchmarks * fix(middleware/cors): handling and wildcard subdomain matching docs(middleware/cors): add How it works and Security Considerations * chore: grammar * Apply suggestions from code review Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * chore: fix misspelling * test(middleware/cors): combine Invalid_Origins tests * refactor(middleware/cors): headers handling * docs(middleware/cors): Update AllowOrigins description * chore: merge * perf(middleware/cors): optimize handler * perf(middleware/cors): optimize handler * chore(middleware/cors): ipdate origin handling logic * chore(middleware/cors): fix header capitalization * docs(middleware/cors): improve sercuity notes * docs(middleware/cors): Improve security notes * docs(middleware/cors): improve CORS overview * docs(middleware/cors): fix ordering of how it works * docs(middleware/cors): add additional info to How to works * docs(middleware/cors): rm space * docs(middleware/cors): add validation for AllowOrigins origins to overview * docs(middleware/cors): update ExposeHeaders and MaxAge descriptions * docs(middleware/cors): Add dynamic origin validation example * docs(middleware/cors): Improve security notes and fix header capitalization * docs(middleware/cors): configuration examples * docs(middleware/cors): `"*"` --------- Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> * fix(middleware/cors): Categorize requests correctly (#2921) * fix(middleware/cors): categorise requests correctly * test(middleware/cors): improve test coverage for request types * test(middleware/cors): Add subdomain matching tests * test(middleware/cors): parallel tests for CORS headers based on request type * test(middleware/cors): Add benchmark for CORS subdomain matching * test(middleware/cors): cover additiona test cases * refactor(middleware/cors): origin validation and normalization * test(middleware/csrf): Fix Benchmark Tests (#2932) * test(middleware/csrf): fix Benchmark_Middleware_CSRF_* * fix(middleware/csrf): update refererMatchesHost() * Prepare release v2.52.3 * fix(middleware/cors): CORS handling (#2937) * fix(middleware/cors): CORS handling * fix(middleware/cors): Vary header handling * test(middleware/cors): Ensure Vary Headers checked * fix(middleware/cors): Vary header handling non-cors OPTIONS requests (#2939) * fix(middleware/cors): Vary header handling non-cors OPTIONS requests * chore(middleware/cors): Add Vary header for non-CORS OPTIONS requests comment * prepare release v2.52.4 * merge v2 in main(v3) * merge v2 in main(v3) * merge v2 in main(v3) --------- Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: tokelo-12 <[email protected]> Co-authored-by: Jason McNeil <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: iRedMail <[email protected]> Co-authored-by: Benjamin Grosse <[email protected]> Co-authored-by: Mehmet Firat KOMURCU <[email protected]> Co-authored-by: Bruno <[email protected]> Co-authored-by: Muhammad Kholid B <[email protected]> Co-authored-by: gilwo <[email protected]> Co-authored-by: Lucas Lemos <[email protected]> Co-authored-by: Muhammed Efe Cetin <[email protected]> Co-authored-by: Juan Calderon-Perez <[email protected]> Co-authored-by: Juan Calderon-Perez <[email protected]> Co-authored-by: Jongmin Kim <[email protected]> Co-authored-by: Giovanni Rivera <[email protected]> Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

github-actions bot added the ☢️ Bug label Feb 26, 2024

sixcolors self-assigned this Feb 26, 2024

sixcolors mentioned this issue Feb 26, 2024

fix(middleware/cors): Validation of multiple Origins #2883

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gaby closed this as completed Mar 1, 2024

ReneWerner87 linked a pull request Mar 1, 2024 that will close this issue

fix(middleware/cors): Validation of multiple Origins #2883

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coderabbitai bot mentioned this issue Mar 11, 2024

fix(middleware/cors): Handling and wildcard subdomain matching #2915

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This was referenced Mar 26, 2024

fix(middleware/cors): CORS handling #2937

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fix(middleware/cors): CORS handling #2938

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coderabbitai bot mentioned this issue Apr 12, 2024

refactor(middleware/cors)!: Config, lists as list types. #2962

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🐛 [BUG]: CORS panic with AcceptOrigins with whitespace #2882

🐛 [BUG]: CORS panic with AcceptOrigins with whitespace #2882

sixcolors commented Feb 26, 2024 •

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gaby commented Mar 1, 2024

🐛 [BUG]: CORS panic with AcceptOrigins with whitespace #2882

🐛 [BUG]: CORS panic with AcceptOrigins with whitespace #2882

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sixcolors commented Feb 26, 2024 • edited Loading

gaby commented Mar 1, 2024

sixcolors commented Feb 26, 2024 •

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