SB2026081977 - Multiple vulnerabilities in Pivotal Concourse

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control (CVE-ID: N/A)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper access control in the HeartbeatWorker endpoint when handling authenticated heartbeat requests to another team\'s worker. A remote user can send a crafted heartbeat request with invalid worker information to cause a denial of service.

The issue affects authenticated users even if they have no team membership.

2) Improper access control (CVE-ID: N/A)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper access control in the TSA worker management functionality when handling connections authenticated with a team-scoped worker private key. A remote privileged user can connect to TSA and land or retire team-scoped workers belonging to other teams to cause a denial of service.

This only affects team-scoped private keys.

Remediation

Install update from vendor's website.

References

• https://github.com/concourse/concourse/security/advisories/GHSA-hg62-49fv-33pp
• https://github.com/concourse/concourse/security/advisories/GHSA-2w8g-h943-5fqh