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vuln-cve/data/2026/4xxx/CVE-2026-4437.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-4437",
"assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"state": "PUBLISHED",
"assignerShortName": "glibc",
"dateReserved": "2026-03-19T19:55:42.906Z",
"datePublished": "2026-03-20T19:59:00.427Z",
"dateUpdated": "2026-10-15T01:12:09.122Z"
},
"containers": {
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"orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
"shortName": "glibc",
"dateUpdated": "2026-03-20T19:59:00.427Z"
},
"title": "gethostbyaddr and gethostbyaddr_r may incorrectly handle DNS response",
"datePublic": "2026-03-20T22:20:00.000Z",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds read",
"type": "CWE"
}
]
}
],
"impacts": [
{
"capecId": "CAPEC-142",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-142 DNS Cache Poisoning"
}
]
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],
"affected": [
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"vendor": "The GNU C Library",
"product": "glibc",
"versions": [
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"status": "affected",
"version": "2.34",
"lessThanOrEqual": "2.43",
"versionType": "custom"
}
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"defaultStatus": "unaffected"
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],
"descriptions": [
{
"lang": "en",
"value": "Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<div>Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.<br></div>"
}
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}
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"references": [
{
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=34014"
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"credits": [
{
"lang": "en",
"value": "Antonio Maini (0rbitingZer0) - 0rbitingZer0@proton.me",
"type": "finder"
},
{
"lang": "en",
"value": "Kevin Farrell",
"type": "reporter"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
},
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-03-23T15:10:34.650805Z",
"id": "CVE-2026-4437",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"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": "2026-03-23T15:13:56.930Z"
}
},
{
"x_adpType": "supplier",
"providerMetadata": {
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP",
"dateUpdated": "2026-10-15T01:12:09.122Z"
},
"affected": [
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.5",
"lessThan": "V3.1.6",
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}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
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"vendor": "Siemens",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
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"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
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}
}