2026-02-06 23:14CVE-2020-37155VulnCheck
PUBLISHED5.2CWE-120

Core FTP Lite 1.3 - Denial of Service (PoC)

Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.

Problem type

Affected products

Core FTP

Core FTP Lite

1.3c Build 1437 - AFFECTED

References

GitHub Security Advisories

GHSA-39mx-hmw6-9hmp

Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that...

https://github.com/advisories/GHSA-39mx-hmw6-9hmp

Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.

JSON source

https://cveawg.mitre.org/api/cve/CVE-2020-37155
Click to expand
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    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-02-06T23:14:09.188Z",
    "dateReserved": "2026-02-03T16:27:45.310Z",
    "datePublished": "2026-02-06T23:14:09.188Z",
    "state": "PUBLISHED"
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  "containers": {
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        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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        "dateUpdated": "2026-02-06T23:14:09.188Z"
      },
      "datePublic": "2020-02-20T00:00:00.000Z",
      "title": "Core FTP Lite 1.3 - Denial of Service (PoC)",
      "descriptions": [
        {
          "lang": "en",
          "value": "Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction."
        }
      ],
      "affected": [
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      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')",
              "cweId": "CWE-120",
              "type": "CWE"
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      "references": [
        {
          "url": "https://www.exploit-db.com/exploits/48100",
          "name": "ExploitDB-48100",
          "tags": [
            "exploit"
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        },
        {
          "url": "http://www.coreftp.com/",
          "name": "Core FTP Official Homepage",
          "tags": [
            "product"
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        },
        {
          "url": "https://www.vulncheck.com/advisories/core-ftp-lite-denial-of-service-poc",
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            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH"
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      "credits": [
        {
          "lang": "en",
          "value": "Berat Isler",
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