166 lines
6.5 KiB
JSON
166 lines
6.5 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-44041",
|
|
"assignerOrgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "securin",
|
|
"dateReserved": "2026-05-05T03:40:37.003Z",
|
|
"datePublished": "2026-07-01T03:33:19.127Z",
|
|
"dateUpdated": "2026-07-09T04:36:09.188Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"title": "UltraVNC vncWc2Mb calls wcslen() before validating that the wide string is NUL-terminated",
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "UltraVNC through 1.8.2.2 contains an out-of-bounds read in the wide-string to multibyte conversion helper. In rfb/dh.cpp:204, the vncWc2Mb() function passes a caller-supplied WCHAR pointer to wcslen() before any bounds check. If the caller provides a wide-character buffer that is not properly NUL-terminated, wcslen() reads past the end of the buffer until it encounters a NUL wchar, resulting in an out-of-bounds read. Under typical Win32 API usage this requires an abnormal caller contract. Impact is limited to a potential information disclosure from adjacent memory regions or a process crash (denial of service) if the over-read crosses a page boundary."
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"vendor": "uvnc",
|
|
"product": "UltraVNC",
|
|
"versions": [
|
|
{
|
|
"version": "0",
|
|
"lessThanOrEqual": "1.8.2.2",
|
|
"status": "affected",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"modules": [
|
|
"winvnc",
|
|
"vncviewer"
|
|
]
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"type": "CWE",
|
|
"cweId": "CWE-125",
|
|
"lang": "en",
|
|
"description": "Out-of-bounds Read"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"format": "CVSS",
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "GENERAL"
|
|
}
|
|
],
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
|
|
"attackVector": "NETWORK",
|
|
"attackComplexity": "LOW",
|
|
"privilegesRequired": "LOW",
|
|
"userInteraction": "NONE",
|
|
"scope": "UNCHANGED",
|
|
"confidentialityImpact": "NONE",
|
|
"integrityImpact": "NONE",
|
|
"availabilityImpact": "LOW",
|
|
"baseScore": 4.3,
|
|
"baseSeverity": "MEDIUM"
|
|
}
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://uvnc.com/",
|
|
"name": "UltraVNC project page",
|
|
"tags": [
|
|
"vendor-advisory"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://github.com/ultravnc/UltraVNC",
|
|
"name": "UltraVNC source repository",
|
|
"tags": [
|
|
"product"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://www.securin.io/zero-days/cve-2026-44041-vncwc2mb-wcslen-before-bounds-check-ultravnc"
|
|
}
|
|
],
|
|
"timeline": [
|
|
{
|
|
"time": "2026-06-02T00:00:00.000Z",
|
|
"lang": "en",
|
|
"value": "Vulnerability discovered during security audit"
|
|
},
|
|
{
|
|
"time": "2026-06-17T00:00:00.000Z",
|
|
"lang": "en",
|
|
"value": "Reported to vendor (coordinated disclosure)"
|
|
},
|
|
{
|
|
"time": "2026-09-15T00:00:00.000Z",
|
|
"lang": "en",
|
|
"value": "Planned public disclosure (90-day window)"
|
|
}
|
|
],
|
|
"credits": [
|
|
{
|
|
"lang": "en",
|
|
"value": "Arjun Basnet, Securin (arjun.basnet@securin.io)",
|
|
"type": "finder"
|
|
}
|
|
],
|
|
"source": {
|
|
"discovery": "EXTERNAL",
|
|
"advisory": "Securin Security Advisory — FINDING-004"
|
|
},
|
|
"providerMetadata": {
|
|
"orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
|
|
"shortName": "securin",
|
|
"dateUpdated": "2026-07-09T04:36:09.188Z"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-07-01T13:10:10.152068Z",
|
|
"id": "CVE-2026-44041",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-07-01T13:10:40.100Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |