136 lines
5.7 KiB
JSON
136 lines
5.7 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-2026-21870",
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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": "2026-01-05T16:44:16.368Z",
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"datePublished": "2026-02-13T17:58:37.205Z",
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"dateUpdated": "2026-02-13T18:19:36.183Z"
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},
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"containers": {
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"cna": {
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"title": "The BACnet Protocol Stack library has an Off-by-one Stack-based Buffer Overflow in tokenizer_string",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-193",
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"lang": "en",
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"description": "CWE-193: Off-by-one Error",
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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": "LOW",
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"attackVector": "LOCAL",
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"availabilityImpact": "HIGH",
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"baseScore": 5.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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-pc83-wp6w-93mx",
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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-pc83-wp6w-93mx"
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},
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{
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"name": "https://github.com/bacnet-stack/bacnet-stack/pull/1196",
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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/1196"
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},
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{
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"name": "https://github.com/bacnet-stack/bacnet-stack/commit/4e1176394a5ae50d2fd0b5790d9bff806dc08465",
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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/commit/4e1176394a5ae50d2fd0b5790d9bff806dc08465"
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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": "<= 1.4.2",
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"status": "affected"
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},
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{
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"version": ">= 1.5.0.rc1, <= 1.5.0.rc2",
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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": "2026-02-13T17:58:37.205Z"
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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 Protocol Stack library provides a BACnet application layer, network layer and media access (MAC) layer communications services. In 1.4.2, 1.5.0.rc2, and earlier, an off-by-one stack-based buffer overflow in the ubasic interpreter causes a crash (SIGABRT) when processing string literals longer than the buffer limit. The tokenizer_string function in src/bacnet/basic/program/ubasic/tokenizer.c incorrectly handles null termination for maximum-length strings. It writes a null byte to dest[40] when the buffer size is only 40 (indices 0-39), triggering a stack overflow."
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}
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],
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"source": {
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"advisory": "GHSA-pc83-wp6w-93mx",
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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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"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": "2026-02-13T18:19:25.750164Z",
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"id": "CVE-2026-21870",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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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": "2026-02-13T18:19:36.183Z"
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}
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}
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]
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}
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} |