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.
PUBLISHED5.2CWE-120
Core FTP Lite 1.3 - Denial of Service (PoC)
Problem type
Affected products
Core FTP
Core FTP Lite
1.3c Build 1437 - AFFECTED
References
ExploitDB-48100
https://www.exploit-db.com/exploits/48100
Core FTP Official Homepage
http://www.coreftp.com/
VulnCheck Advisory: Core FTP Lite 1.3 - Denial of Service (PoC)
https://www.vulncheck.com/advisories/core-ftp-lite-denial-of-service-poc
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-hmw6-9hmpCore 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-2020-37155Click to expand
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2020-37155",
"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"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"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": [
{
"vendor": "Core FTP",
"product": "Core FTP Lite",
"versions": [
{
"version": "1.3c Build 1437",
"status": "affected"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')",
"cweId": "CWE-120",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://www.exploit-db.com/exploits/48100",
"name": "ExploitDB-48100",
"tags": [
"exploit"
]
},
{
"url": "http://www.coreftp.com/",
"name": "Core FTP Official Homepage",
"tags": [
"product"
]
},
{
"url": "https://www.vulncheck.com/advisories/core-ftp-lite-denial-of-service-poc",
"name": "VulnCheck Advisory: Core FTP Lite 1.3 - Denial of Service (PoC)",
"tags": [
"third-party-advisory"
]
}
],
"metrics": [
{
"format": "CVSS"
},
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH"
}
}
],
"credits": [
{
"lang": "en",
"value": "Berat Isler",
"type": "finder"
}
]
}
}
}