CVE-2022-31683

Team scope authorization bypass when Post/Put request with :team_name in body, allows HTTP parameter pollution

For some Post/Put Concourse endpoint containing :team_name in the URL, a Concourse user can send a request with body including :team_name=team2 to bypass team scope check to gain access to certain resources belong to any other team. The user only needs a valid user session and belongs to team2.

Exploitable endpoints:

{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/jobs/:job_name/builds/:build_name", Method: "POST", Name: RerunJobBuild},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/jobs/:job_name/pause", Method: "PUT", Name: PauseJob},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/jobs/:job_name/unpause", Method: "PUT", Name: UnpauseJob},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/jobs/:job_name/schedule", Method: "PUT", Name: ScheduleJob},

{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/pause", Method: "PUT", Name: PausePipeline},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/unpause", Method: "PUT", Name: UnpausePipeline},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/expose", Method: "PUT", Name: ExposePipeline},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/hide", Method: "PUT", Name: HidePipeline},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/rename", Method: "PUT", Name: RenamePipeline},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/archive", Method: "PUT", Name: ArchivePipeline},

{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/resources/:resource_name/versions/:resource_config_version_id/enable", Method: "PUT", Name: EnableResourceVersion},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/resources/:resource_name/versions/:resource_config_version_id/disable", Method: "PUT", Name: DisableResourceVersion},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/resources/:resource_name/versions/:resource_config_version_id/pin", Method: "PUT", Name: PinResourceVersion},
{Path: "/api/v1/teams/:team_name/pipelines/:pipeline_name/resources/:resource_name/unpin", Method: "PUT", Name: UnpinResource},
	
{Path: "/api/v1/teams/:team_name/artifacts", Method: "POST", Name: CreateArtifact},

The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions. Typical impact: unauthorized data access or execution of privileged operations.

CVE-2022-31683 has a CVSS score of 5.4 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (6.7.9, 7.8.3); upgrading removes the vulnerable code path.

Kodem intelligence

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Concourse v6.7.9 and v7.8.3 were both released with a fix on October 12, 2022.

Instead of using FormValue to parse team_name in the request, where allows body parameters to take precedence over URL query string values, both patch versions are now using URL.Query().Get() over multiple scope handlers to prevent the parameter pollution.

1. What is CVE-2022-31683? CVE-2022-31683 is a medium-severity incorrect authorization vulnerability in github.com/concourse/concourse (go), affecting versions < 6.7.9. It is fixed in 6.7.9, 7.8.3. The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions.
2. How severe is CVE-2022-31683? CVE-2022-31683 has a CVSS score of 5.4 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of github.com/concourse/concourse are affected by CVE-2022-31683? github.com/concourse/concourse (go) versions < 6.7.9 is affected.
4. Is there a fix for CVE-2022-31683? Yes. CVE-2022-31683 is fixed in 6.7.9, 7.8.3. Upgrade to this version or later.
5. Is CVE-2022-31683 exploitable, and should I be worried? Whether CVE-2022-31683 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2022-31683 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2022-31683?
   • Upgrade github.com/concourse/concourse to 6.7.9 or later
   • Upgrade github.com/concourse/concourse to 7.8.3 or later

Other vulnerabilities in github.com/concourse/concourse