GHSA-5MV9-Q7FQ-9394

Vulnerability from github – Published: 2021-06-01 21:21 – Updated: 2023-01-10 16:08
VLAI?
Summary
Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint
Details

Impact

Due to incorrect use of a default URL, singularity action commands (run/shell/exec) specifying a container using a library:// URI will always attempt to retrieve the container from the default remote endpoint (cloud.sylabs.io) rather than the configured remote endpoint.

An attacker may be able to push a malicious container to the default remote endpoint with a URI that is identical to the URI used by a victim with a non-default remote endpoint, thus executing the malicious container.

Only action commands (run/shell/exec) against library:// URIs are affected. Other commands such as pull / push respect the configured remote endpoint.

Patches

All users should upgrade to Singularity 3.7.4 or later.

A patch was applied at: https://github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796

Workarounds

Users who only interact with the default remote endpoint are not affected.

Installations with an execution control list configured to restrict execution to containers signed with specific secure keys are not affected.

For more information

General questions about the impact of the advisory can be asked in the:

Any sensitive security concerns should be directed to: security@sylabs.io

See our Security Policy here: https://sylabs.io/security-policy

Severity ?
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sylabs/singularity"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.7.2"
            },
            {
              "fixed": "3.7.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-32635"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-28T20:04:35Z",
    "nvd_published_at": "2021-05-28T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nDue to incorrect use of a default URL, `singularity` action commands (`run`/`shell`/`exec`) specifying a container using a `library://` URI will always attempt to retrieve the container from the default remote endpoint (`cloud.sylabs.io`) rather than the configured remote endpoint.\n\nAn attacker may be able to push a malicious container to the default remote endpoint with a URI that is identical to the URI used by a victim with a non-default remote endpoint, thus executing the malicious container.\n\nOnly action commands (`run`/`shell`/`exec`) against `library://` URIs are affected. Other commands such as `pull` / `push` respect the configured remote endpoint.\n\n### Patches\n\nAll users should upgrade to Singularity 3.7.4 or later.\n\nA patch was applied at: https://github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796\n\n### Workarounds\n\nUsers who only interact with the default remote endpoint are not affected.\n\nInstallations with an execution control list configured to restrict execution to containers signed with specific secure keys are not affected.\n\n### For more information\n\nGeneral questions about the impact of the advisory can be asked in the:\n\n- [SingularityCE Slack Channel](https://singularityce.slack.com)\n- [SingularityCE Mailing List](https://groups.google.com/g/singularity-ce)\n\nAny sensitive security concerns should be directed to: security@sylabs.io\n\nSee our Security Policy here: https://sylabs.io/security-policy",
  "id": "GHSA-5mv9-q7fq-9394",
  "modified": "2023-01-10T16:08:38Z",
  "published": "2021-06-01T21:21:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hpcng/singularity/security/advisories/GHSA-jq42-hfch-42f3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32635"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sylabs/singularity"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sylabs/singularity/releases/tag/v3.7.4"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-50"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.