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FKIE_CVE-2026-82437

Vulnerability from fkie_nvd - Published: 2026-09-14 15:17 - Updated: 2026-09-14 20:58
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
Description The Logviewer offers `logs.users` and `logs.groups` so operators can control who may read log content. For daemon logs those settings were not applied: the access decision combined the "this is a daemon log" flag with the authorizer result in a way that discarded the authorizer's answer whenever the flag was set, and the daemon log page and download endpoints reached the handler without consulting an authorizer at all. Any user able to pass the configured servlet filter could therefore read `nimbus.log`, `supervisor.log` and the other daemon logs on every reachable node, which contain other tenants' topology names, owners and configuration fragments. The same advisory covers the log listing endpoints, which accepted a user argument and never applied it, so `/listLogs` and `/searchLogs` returned every tenant's topology and worker log file names regardless of the caller. That part is metadata only. There was no configuration that closed either behaviour. Mitigation Upgrade to 3.1.0, where the daemon log paths evaluate the same configured user and group lists that the worker log paths already used, and the listing endpoints filter by the requesting user. Users who cannot upgrade immediately should place the Logviewer behind a reverse proxy that restricts the daemon log endpoints, and should treat daemon log content as readable by any filter-authenticated user. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.
References
security@apache.orghttps://lists.apache.org/thread/hqyj3spllmbj6vg9vmx29b1tjhzysdkl
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/09/13/16
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.storm:storm-webapp",
          "product": "Apache Storm Logviewer",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.1.0",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Description\n\nThe Logviewer offers `logs.users` and `logs.groups` so operators can control who may read log content. For\ndaemon logs those settings were not applied: the access decision combined the \"this is a daemon log\" flag\nwith the authorizer result in a way that discarded the authorizer\u0027s answer whenever the flag was set, and\nthe daemon log page and download endpoints reached the handler without consulting an authorizer at all. Any\nuser able to pass the configured servlet filter could therefore read `nimbus.log`, `supervisor.log` and the\nother daemon logs on every reachable node, which contain other tenants\u0027 topology names, owners and\nconfiguration fragments.\n\nThe same advisory covers the log listing endpoints, which accepted a user argument and never applied it, so\n`/listLogs` and `/searchLogs` returned every tenant\u0027s topology and worker log file names regardless of the\ncaller. That part is metadata only.\n\nThere was no configuration that closed either behaviour.\n\nMitigation\n\nUpgrade to 3.1.0, where the daemon log paths evaluate the same configured user and group lists that the\nworker log paths already used, and the listing endpoints filter by the requesting user.\n\nUsers who cannot upgrade immediately should place the Logviewer behind a reverse proxy that restricts the\ndaemon log endpoints, and should treat daemon log content as readable by any filter-authenticated user.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm."
    }
  ],
  "id": "CVE-2026-82437",
  "lastModified": "2026-09-14T20:58:48.430",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82437",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-14T19:54:14.405653Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-14T15:17:10.757",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread/hqyj3spllmbj6vg9vmx29b1tjhzysdkl"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/13/16"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}



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