Vulnerability · Published Mar 6, 2024 · Assigned by GitHub_M
CVE-2024-27918Coder's OIDC authentication allows email with partially matching domain to register
High 8.2
In plain English
A high-severity improper input validation in coder from coder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Coder allows oragnizations to provision remote development environments via Terraform. Prior to versions 2.6.1, 2.7.3, and 2.8.4, a vulnerability in Coder's OIDC authentication could allow an attacker to bypass the `CODER_OIDC_EMAIL_DOMAIN` verification and create an account with an email not in the allowlist. Deployments are only affected if the OIDC provider allows users to create accounts on the provider. During OIDC registration, the user's email was improperly validated against the allowed `CODER_OIDC_EMAIL_DOMAIN`s. This could allow a user with a domain that only partially matched an allowed domain to successfully login or register. An attacker could register a domain name that exploited this vulnerability and register on a Coder instance with a public OIDC provider. Coder instances with OIDC enabled and protected by the `CODER_OIDC_EMAIL_DOMAIN` configuration are affected. Coder instances using a private OIDC provider are not affected, as arbitrary users cannot register through a private OIDC provider without first having an account on the provider. Public OIDC providers are impacted. GitHub authentication and external authentication are not impacted. This vulnerability is remedied in versions 2.8.4, 2.7.3, and 2.6.1 All versions prior to these patches are affected by the vulnerability.*It is recommended that customers upgrade their deployments as soon as possible if they are utilizing OIDC authentication with the `CODER_OIDC_EMAIL_DOMAIN` setting.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/coder/coder | no fix listed | GHSA-7cc2-r658-7xpf |
| Go | github.com/coder/coder | no fix listed | GO-2024-2602 |
| Go | github.com/coder/coder/v2 | 2.8.4 | GHSA-7cc2-r658-7xpf |
| Go | github.com/coder/coder/v2 | 2.7.3 | GHSA-7cc2-r658-7xpf |
| Go | github.com/coder/coder/v2 | 2.6.1 | GHSA-7cc2-r658-7xpf |
| Go | github.com/coder/coder/v2 | 2.6.1, 2.7.3, 2.8.4 | GO-2024-2602 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
References
- https://github.com/coder/coder/security/advisories/GHSA-7cc2-r658-7xpf x_refsource_CONFIRM
- https://github.com/coder/coder/commit/1171ce7add017481d28441575024209ac160ecb0 x_refsource_MISC
- https://github.com/coder/coder/commit/2ba84911f8b02605e5958d5e4a2fe3979ec50b31 x_refsource_MISC
- https://github.com/coder/coder/commit/2d37eb42e7db656e343fe1f36de5ab1a1a62f4fb x_refsource_MISC
- https://github.com/coder/coder/commit/4439a920e454a82565e445e4376c669e3b89591c x_refsource_MISC