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DEBIAN-CVE-2026-48687

Type: advisorySource: OSV1 source record

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integration plugin. The _log() function in src/juniper_plugin/fastnetmon_juniper.php (lines 117-118) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec("echo `date` \"- {FASTNETMON] - " . $msg . " \" >> " . $FILE_LOG_TMP). The $msg variable contains unsanitized data derived from command-line arguments argv[1] through argv[3], which represent the attack IP address, direction, and power. While FastNetMon's C++ core currently passes IP addresses via inet_ntoa() (which only produces safe dotted-decimal notation), the PHP script performs no input validation or shell escaping. If the script is invoked directly, by another orchestration system, or if future code changes pass string-sourced IPs, arbitrary commands can be injected. The correct fix is to replace exec() with file_put_contents() or use escapeshellarg() on all parameters.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-48687

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-48687

fastnetmon

Source reference: /affected/0/package/name

Affected versions
1.2.4-2

Source reference: /affected/0/versions

1.2.4-2+deb12u1

Source reference: /affected/0/versions

1.2.5-1

Source reference: /affected/0/versions

1.2.5-2

Source reference: /affected/0/versions

1.2.5-2~bpo12+1

Source reference: /affected/0/versions

1.2.6-1

Source reference: /affected/0/versions

1.2.6-1~bpo12+1

Source reference: /affected/0/versions

1.2.7-1

Source reference: /affected/0/versions

1.2.7-1~bpo12+1

Source reference: /affected/0/versions

1.2.8+git20250911-1

Source reference: /affected/0/versions

1.2.8+git20250911-2

Source reference: /affected/0/versions

1.2.8-1

Source reference: /affected/0/versions

1.2.8-1~bpo12+1

Source reference: /affected/0/versions

1.2.9-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

fastnetmon

Source reference: /affected/1/package/name

Affected versions
1.2.8+git20250911-1

Source reference: /affected/1/versions

1.2.8+git20250911-2

Source reference: /affected/1/versions

1.2.8-1

Source reference: /affected/1/versions

Fixed versions
1.2.9-0+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

fastnetmon

Source reference: /affected/2/package/name

Affected versions
1.2.8+git20250911-1

Source reference: /affected/2/versions

1.2.8+git20250911-2

Source reference: /affected/2/versions

1.2.8-1

Source reference: /affected/2/versions

Fixed versions
1.2.9-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "fastnetmon",
      "purl": "pkg:deb/debian/fastnetmon?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.2.4-2",
      "1.2.4-2+deb12u1",
      "1.2.5-1",
      "1.2.5-2",
      "1.2.5-2~bpo12+1",
      "1.2.6-1",
      "1.2.6-1~bpo12+1",
      "1.2.7-1",
      "1.2.7-1~bpo12+1",
      "1.2.8+git20250911-1",
      "1.2.8+git20250911-2",
      "1.2.8-1",
      "1.2.8-1~bpo12+1",
      "1.2.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48687.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.2.9-0+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "fastnetmon",
      "purl": "pkg:deb/debian/fastnetmon?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.2.8+git20250911-1",
      "1.2.8+git20250911-2",
      "1.2.8-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48687.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.2.9-1"
          }
        ]
      }
    ],
    "package": {
      "name": "fastnetmon",
      "purl": "pkg:deb/debian/fastnetmon?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.2.8+git20250911-1",
      "1.2.8+git20250911-2",
      "1.2.8-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48687.json"
    },
    "ecosystem_specific": {
      "urgency": "unimportant"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57232 · Revision 1
Added to Heist Feed
Publisher date
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