x/vulndb: potential Go vuln in github.com/stacklok/minder: CVE-2024-35238

[GoVulnBot]

CVE-2024-35238 references github.com/stacklok/minder, which may be a Go module.

Description:
Minder by Stacklok is an open source software supply chain security platform. Minder prior to version 0.0.51 is vulnerable to a denial-of-service (DoS) attack which could allow an attacker to crash the Minder server and deny other users access to it. The root cause of the vulnerability is that Minders sigstore verifier reads an untrusted response entirely into memory without enforcing a limit on the response body. An attacker can exploit this by making Minder make a request to an attacker-controlled endpoint which returns a response with a large body which will crash the Minder server. Specifically, the point of failure is where Minder parses the response from the GitHub attestations endpoint in getAttestationReply. Here, Minder makes a request to the orgs/$owner/attestations/$checksumref GitHub endpoint (line 285) and then parses the response into the AttestationReply (line 295). The way Minder parses the response on line 295 makes it prone to DoS if the response is large enough. Essentially, the response needs to be larger than the machine has available memory. Version 0.0.51 contains a patch for this issue.

The content that is hosted at the orgs/$owner/attestations/$checksumref GitHub attestation endpoint is controlled by users including unauthenticated users to Minders threat model. However, a user will need to configure their own Minder settings to cause Minder to make Minder send a request to fetch the attestations. The user would need to know of a package whose attestations were configured in such a way that they would return a large response when fetching them. As such, the steps needed to carry out this attack would look as such:

1. The attacker adds a package to ghcr.io with attestations that can be fetched via the orgs/$owner/attestations/$checksumref GitHub endpoint.
2. The attacker registers on Minder and makes Minder fetch the attestations.
3. Minder fetches attestations and crashes thereby being denied of service.

References:

• NIST: https://nvd.nist.gov/vuln/detail/CVE-2024-35238
• JSON: https://github.com/CVEProject/cvelist/tree/0fbeb805f120f637915343873bebe302f933ec0b/2024/35xxx/CVE-2024-35238.json
• advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-35238
• fix: mindersec/minder@fe321d3
• web: https://github.com/stacklok/minder/blob/daccbc12e364e2d407d56b87a13f7bb24cbdb074/internal/verifier/sigstore/container/container.go#L271-L300
• web: GHSA-8fmj-33gw-g7pw
• Imported by: https://pkg.go.dev/github.com/stacklok/minder?tab=importedby

Cross references:

• Module github.com/stacklok/minder appears in issue x/vulndb: potential Go vuln in github.com/stacklok/minder: CVE-2024-27093 #2582 NOT_IMPORTABLE
• Module github.com/stacklok/minder appears in issue x/vulndb: potential Go vuln in github.com/stacklok/minder: GHSA-v627-69v2-xx37 #2608
• Module github.com/stacklok/minder appears in issue x/vulndb: potential Go vuln in github.com/stacklok/minder: GHSA-9c5w-9q3f-3hv7 #2821
• Module github.com/stacklok/minder appears in issue x/vulndb: potential Go vuln in github.com/stacklok/minder: CVE-2024-35185 #2864

See doc/triage.md for instructions on how to triage this report.

id: GO-ID-PENDING
modules:
    - module: github.com/stacklok/minder
      vulnerable_at: 0.0.51
      packages:
        - package: minder
summary: CVE-2024-35238 in github.com/stacklok/minder
cves:
    - CVE-2024-35238
references:
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-35238
    - fix: https://github.com/stacklok/minder/commit/fe321d345b4f738de6a06b13207addc72b59f892
    - web: https://github.com/stacklok/minder/blob/daccbc12e364e2d407d56b87a13f7bb24cbdb074/internal/verifier/sigstore/container/container.go#L271-L300
    - web: https://github.com/stacklok/minder/security/advisories/GHSA-8fmj-33gw-g7pw
source:
    id: CVE-2024-35238
    created: 2024-05-27T19:01:29.282888621Z
review_status: UNREVIEWED

[gopherbot]

Change https://go.dev/cl/590277 mentions this issue: data/reports: add 26 unreviewed reports