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Security Advisories: GSA_kwCzR0hTQS13Y3g5LWNjcGotaHgzY84ABAuW

Coder vulnerable to post-auth URL redirection to untrusted site ('Open Redirect')

Summary

An issue on Coder's login page allows attackers to craft a Coder URL that when clicked by a logged in user could redirect them to a website the attacker controls, e.g. https://google.com.

Details

On the login page, Coder checks for the presence of a redirect query parameter. On successful login, the user would be redirected to the location of the parameter. Improper sanitization allows attackers to specify a URL outside of the Coder application to redirect users to.

Impact

Coder users could potentially be redirected to a untrusted website if tricked into clicking a URL crafted by the attacker. Coder authentication tokens are not leaked to the resulting website.

To check if your deployment is vulnerable, visit the following URL for your Coder deployment:

Patched Versions

This vulnerability is remedied in

All versions prior to 2.3.1 are not affected.

Thanks

References

https://github.com/coder/coder/security/advisories/GHSA-wcx9-ccpj-hx3c
https://github.com/coder/coder/commit/69c1d981e3131e50d52b01f6a360abadaad699e6

Permalink: https://github.com/advisories/GHSA-wcx9-ccpj-hx3c
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS13Y3g5LWNjcGotaHgzY84ABAuW
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 9 days ago
Updated: 9 days ago


CVSS Score: 4.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Identifiers: GHSA-wcx9-ccpj-hx3c
References: Repository: https://github.com/coder/coder
Blast Radius: 1.0

Affected Packages

go:github.com/coder/coder/v2
Dependent packages: 4
Dependent repositories: 0
Downloads:
Affected Version Ranges: >= 2.3.1, < 2.14.4, >= 2.15.0, < 2.15.3, = 2.16.0
Fixed in: 2.14.4, 2.15.3, 2.16.1
All affected versions: 2.3.1, 2.3.2, 2.3.3, 2.4.0, 2.5.0, 2.5.1, 2.6.0, 2.6.1, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5, 2.9.0, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 2.10.0, 2.10.1, 2.10.2, 2.10.3, 2.11.0, 2.11.1, 2.11.2, 2.11.3, 2.11.4, 2.12.0, 2.12.1, 2.12.2, 2.12.3, 2.12.4, 2.12.5, 2.12.6, 2.13.0, 2.13.1, 2.13.2, 2.13.3, 2.13.4, 2.13.5, 2.14.0, 2.14.1, 2.14.2, 2.14.3, 2.15.0, 2.15.1, 2.15.2, 2.16.0
All unaffected versions: 2.0.0, 2.0.1, 2.0.2, 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.2.0, 2.2.1, 2.3.0, 2.15.3