207 lines
8.6 KiB
JSON
207 lines
8.6 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-18103",
|
|
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "redhat",
|
|
"dateReserved": "2026-07-28T17:35:42.520Z",
|
|
"datePublished": "2026-08-04T23:08:02.438Z",
|
|
"dateUpdated": "2026-11-10T20:35:52.672Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"title": "Dhcp-server: dhcp-server: persistent denial of service due to buffer overflow via omapi",
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"content": {
|
|
"value": "Low",
|
|
"namespace": "https://access.redhat.com/security/updates/classification/"
|
|
},
|
|
"type": "Red Hat severity rating"
|
|
}
|
|
},
|
|
{
|
|
"cvssV3_1": {
|
|
"attackComplexity": "LOW",
|
|
"attackVector": "NETWORK",
|
|
"availabilityImpact": "HIGH",
|
|
"baseScore": 4.9,
|
|
"baseSeverity": "MEDIUM",
|
|
"confidentialityImpact": "NONE",
|
|
"integrityImpact": "NONE",
|
|
"privilegesRequired": "HIGH",
|
|
"scope": "UNCHANGED",
|
|
"userInteraction": "NONE",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
|
|
"version": "3.1"
|
|
},
|
|
"format": "CVSS"
|
|
}
|
|
],
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "A flaw was found in dhcp-server. A remote attacker with network access to the OMAPI (Open Management Application Programming Interface) port, especially if not secured with TSIG (Transaction Signature) key authentication, could send a specially crafted lease creation request. This request, containing an overly long InfiniBand MAC address, triggers a buffer overflow in the `print_hw_addr()` function. Successful exploitation leads to a persistent denial of service (DoS), causing the `dhcpd` service to crash and preventing it from restarting without manual intervention."
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"vendor": "Red Hat",
|
|
"product": "Red Hat Enterprise Linux 9",
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"packageName": "dhcp",
|
|
"defaultStatus": "affected",
|
|
"versions": [
|
|
{
|
|
"version": "12:4.4.2-22.b1.el9",
|
|
"lessThan": "*",
|
|
"versionType": "rpm",
|
|
"status": "unaffected"
|
|
}
|
|
],
|
|
"cpes": [
|
|
"cpe:/o:redhat:enterprise_linux:9::baseos"
|
|
]
|
|
},
|
|
{
|
|
"vendor": "Red Hat",
|
|
"product": "Red Hat Enterprise Linux 6",
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"packageName": "dhcp",
|
|
"defaultStatus": "affected",
|
|
"cpes": [
|
|
"cpe:/o:redhat:rhel_els:6"
|
|
]
|
|
},
|
|
{
|
|
"vendor": "Red Hat",
|
|
"product": "Red Hat Enterprise Linux 7",
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"packageName": "dhcp",
|
|
"defaultStatus": "affected",
|
|
"cpes": [
|
|
"cpe:/o:redhat:rhel_els:7"
|
|
]
|
|
},
|
|
{
|
|
"vendor": "Red Hat",
|
|
"product": "Red Hat Enterprise Linux 8",
|
|
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
|
|
"packageName": "dhcp",
|
|
"defaultStatus": "affected",
|
|
"cpes": [
|
|
"cpe:/a:redhat:enterprise_linux:8"
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://access.redhat.com/errata/RHSA-2026:97486",
|
|
"name": "RHSA-2026:97486",
|
|
"tags": [
|
|
"vendor-advisory",
|
|
"x_refsource_REDHAT"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://access.redhat.com/security/cve/CVE-2026-18103",
|
|
"tags": [
|
|
"vdb-entry",
|
|
"x_refsource_REDHAT"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508081",
|
|
"name": "RHBZ#2508081",
|
|
"tags": [
|
|
"issue-tracking",
|
|
"x_refsource_REDHAT"
|
|
]
|
|
}
|
|
],
|
|
"datePublic": "2026-07-28T17:35:55.440Z",
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"cweId": "CWE-120",
|
|
"description": "Buffer Copy without Checking Size of Input",
|
|
"lang": "en",
|
|
"type": "CWE"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"x_redhatCweChain": "CWE-120: Buffer Copy without Checking Size of Input",
|
|
"workarounds": [
|
|
{
|
|
"lang": "en",
|
|
"value": "To mitigate this issue, secure OMAPI access by configuring TSIG key authentication to prevent unauthorized connections to the OMAPI port (7911). If the `dhcpd` service has already crashed due to this flaw, manually remove the problematic InfiniBand lease entry from `/var/lib/dhcpd/dhcpd.leases` and then restart the `dhcpd` service. Restarting the `dhcpd` service may temporarily interrupt DHCP services for clients."
|
|
}
|
|
],
|
|
"timeline": [
|
|
{
|
|
"lang": "en",
|
|
"time": "2026-07-28T17:27:20.405Z",
|
|
"value": "Reported to Red Hat."
|
|
},
|
|
{
|
|
"lang": "en",
|
|
"time": "2026-07-28T17:35:55.440Z",
|
|
"value": "Made public."
|
|
}
|
|
],
|
|
"credits": [
|
|
{
|
|
"lang": "en",
|
|
"value": "This issue was discovered by Martin Osvald (Red Hat)."
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
|
|
"shortName": "redhat",
|
|
"dateUpdated": "2026-11-10T20:35:52.672Z"
|
|
},
|
|
"x_generator": {
|
|
"engine": "cvelib 1.8.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-08-05T13:58:45.550060Z",
|
|
"id": "CVE-2026-18103",
|
|
"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": "2026-08-05T13:58:53.130Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |