CVE-2026-92697 (GCVE-0-2026-92697)

Vulnerability from cvelistv5 – Published: 2026-11-05 22:34 – Updated: 2026-11-05 22:34
VLAI
Title
FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read
Summary
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the NetFlow v9 collector calls  strlen()  on an attacker-controlled interface-description field without bounding the scan to the field’s declared length. Although fields longer than 128 bytes are excluded from this operation, an accepted field without a null terminator can cause reads beyond the field and packet buffer. An unauthenticated remote attacker who can send crafted UDP packets to the collector can trigger an out-of-bounds read and potentially crash the process, causing denial of service. No fixed release is available as of this review.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7985 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
pavel-odintsov fastnetmon Affected: <= 1.2.9
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "fastnetmon",
          "vendor": "pavel-odintsov",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 1.2.9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the NetFlow v9 collector calls \u00a0strlen()\u00a0 on an attacker-controlled interface-description field without bounding the scan to the field\u2019s declared length. Although fields longer than 128 bytes are excluded from this operation, an accepted field without a null terminator can cause reads beyond the field and packet buffer. An unauthenticated remote attacker who can send crafted UDP packets to the collector can trigger an out-of-bounds read and potentially crash the process, causing denial of service. No fixed release is available as of this review."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T22:34:52.385Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-ff5f-p5jw-8fq2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-ff5f-p5jw-8fq2"
        },
        {
          "name": "https://github.com/pavel-odintsov/fastnetmon/pull/1088",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pavel-odintsov/fastnetmon/pull/1088"
        },
        {
          "name": "https://github.com/pavel-odintsov/fastnetmon/commit/9dc766074dc3048ec5007bc3f6a44f2b42d1e1cb",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pavel-odintsov/fastnetmon/commit/9dc766074dc3048ec5007bc3f6a44f2b42d1e1cb"
        }
      ],
      "source": {
        "advisory": "GHSA-ff5f-p5jw-8fq2",
        "discovery": "UNKNOWN"
      },
      "title": "FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-92697",
    "datePublished": "2026-11-05T22:34:52.385Z",
    "dateReserved": "2026-09-16T16:22:31.541Z",
    "dateUpdated": "2026-11-05T22:34:52.385Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-92697",
      "date": "2026-11-08",
      "epss": "0.01138",
      "percentile": "0.66803"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "fastnetmon",
                "vendor": "pavel-odintsov",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c= 1.2.9"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the NetFlow v9 collector calls \u00a0strlen()\u00a0 on an attacker-controlled interface-description field without bounding the scan to the field\u2019s declared length. Although fields longer than 128 bytes are excluded from this operation, an accepted field without a null terminator can cause reads beyond the field and packet buffer. An unauthenticated remote attacker who can send crafted UDP packets to the collector can trigger an out-of-bounds read and potentially crash the process, causing denial of service. No fixed release is available as of this review."
          }
        ],
        "id": "CVE-2026-92697",
        "lastModified": "2026-11-05T23:17:02.593",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-11-05T23:17:02.460",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pavel-odintsov/fastnetmon/commit/9dc766074dc3048ec5007bc3f6a44f2b42d1e1cb"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pavel-odintsov/fastnetmon/pull/1088"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-ff5f-p5jw-8fq2"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-11-06T19:23:23+00:00",
      "cve": "CVE-2026-92697",
      "id": "CVE-2026-92697",
      "initial_release_date": "2026-11-05T22:34:52.385000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "fastnetmon: fastnetmon: Denial of Service via crafted NetFlow packets",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92697.json",
      "version": "3"
    }
  }
}



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