163 lines
7.1 KiB
JSON
163 lines
7.1 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-53918",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-11T15:46:12.315Z",
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"datePublished": "2026-10-23T13:21:00.665Z",
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"dateUpdated": "2026-10-30T17:42:21.816Z"
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},
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"containers": {
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"cna": {
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"title": "odhcpd DHCPv6 IA dangling first pointer use-after-free",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-416",
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"lang": "en",
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"description": "CWE-416: Use After Free",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"cweId": "CWE-672",
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"lang": "en",
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"description": "CWE-672: Operation on a Resource after Expiration or Release",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"cweId": "CWE-825",
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"lang": "en",
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"description": "CWE-825: Expired Pointer Dereference",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW",
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"vulnAvailabilityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.8,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
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"version": "4.0"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/openwrt/odhcpd/security/advisories/GHSA-44ff-jcwh-wgc2",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/openwrt/odhcpd/security/advisories/GHSA-44ff-jcwh-wgc2"
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},
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{
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"name": "https://github.com/openwrt/odhcpd/commit/26b122007030ebf192376aff8f98d428b25e2a93",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/openwrt/odhcpd/commit/26b122007030ebf192376aff8f98d428b25e2a93"
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},
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{
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"name": "https://github.com/openwrt/odhcpd/commit/5b283832c0a77aed20f1cc384ffc40bc768b06e9",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/openwrt/odhcpd/commit/5b283832c0a77aed20f1cc384ffc40bc768b06e9"
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}
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],
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"affected": [
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{
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"vendor": "openwrt",
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"product": "odhcpd",
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"versions": [
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{
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"version": "< 25.12",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-10-23T13:21:00.665Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "odhcpd is the DHCPv6, DHCPv4, and router-advertisement server used by OpenWrt. Prior to version 25.12, odhcpd's DHCPv6 IA handler keeps a per-message `first` lease pointer so multiple IA options in one message reuse the same Reconfigure authentication key. A DHCPv6 REQUEST from an adjacent-network client can make the first IA set `first`, then make a later same-IAID IA fail the on-link check and free that same lease, leaving `first` dangling. A following IA in the same packet allocates a new lease and copies `first->key`, producing a 16-byte heap-use-after-free read. ASan confirms the UAF; native tracing shows the packet shape can deterministically reclaim the freed lease as the destination allocation, producing a zeroed Reconfigure key copy. The validated impact is unauthenticated adjacent-network denial of service and DHCPv6 Reconfigure/ForceRenew key confusion. Arbitrary PC control is not proven for this UAF alone. This issue has been patched in version 25.12."
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}
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],
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"source": {
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"advisory": "GHSA-44ff-jcwh-wgc2",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/openwrt/odhcpd/security/advisories/GHSA-44ff-jcwh-wgc2",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-30T17:42:15.930203Z",
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"id": "CVE-2026-53918",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-30T17:42:21.816Z"
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}
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}
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]
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}
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} |