99 lines
4.6 KiB
JSON
99 lines
4.6 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-2026-97692",
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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": "2026-09-24T21:43:37.208Z",
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"datePublished": "2026-11-13T18:42:41.703Z",
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"dateUpdated": "2026-11-13T18:42:41.703Z"
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},
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"containers": {
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"cna": {
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"title": "BACnet Stack: pre-auth out-of-bounds read that escalates to an out-of-bounds write into global memory",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-787",
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"lang": "en",
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"description": "CWE-787: Out-of-bounds Write",
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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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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.7,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "LOW",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H",
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"version": "3.1"
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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/bacnet-stack/bacnet-stack/security/advisories/GHSA-gr74-333w-7wg8",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-gr74-333w-7wg8"
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},
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{
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"name": "https://github.com/bacnet-stack/bacnet-stack/pull/1435",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/bacnet-stack/bacnet-stack/pull/1435"
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}
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],
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"affected": [
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{
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"vendor": "bacnet-stack",
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"product": "bacnet-stack",
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"versions": [
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{
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"version": "< 1.4.6",
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"status": "affected"
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},
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{
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"version": ">= 1.5.0, < 1.5.2",
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"status": "affected"
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},
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{
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"version": ">= 1.6.0, < 1.6.1",
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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": "2026-11-13T18:42:41.703Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.6, 1.5.2, and 1.6.1, the BACnet/SC message decoder walks the header-option list by following each option's MORE bit. Nothing rejects a list whose last option still has the MORE bit set, and the decode walk has no upper bound on how many options it processes. A single crafted BVLC-SC frame makes the walk advance one option past the end of the message and read message[message_len], one byte out of bounds. When the bytes after the message carry more MORE-set option markers, the walk keeps going: it runs past the fixed 4-entry option array and writes decoded option fields out of bounds. On the server that decode array is the static global bsc_dm, so the out-of-bounds write lands in adjacent BSS. Both faults are reachable before authentication, from the first frame a peer sends on a BACnet/SC connection, and the bytes that follow the message are the same peer's prior-frame data. This issue has been patched in versions 1.4.6, 1.5.2, 1.6.1, and 1.7.0."
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}
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],
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"source": {
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"advisory": "GHSA-gr74-333w-7wg8",
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"discovery": "UNKNOWN"
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}
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}
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}
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} |