156 lines
8.5 KiB
JSON
156 lines
8.5 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-2026-87849",
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"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
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"state": "PUBLISHED",
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"assignerShortName": "apache",
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"dateReserved": "2026-09-09T12:24:36.838Z",
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"datePublished": "2026-10-21T12:18:29.706Z",
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"dateUpdated": "2026-10-26T13:54:40.137Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
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"shortName": "apache",
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"dateUpdated": "2026-10-21T12:18:29.706Z"
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},
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"title": "Apache bRPC: Out-of-bounds read via non-object fields in Discovery naming-service reply parsing",
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"problemTypes": [
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{
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"descriptions": [
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{
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"description": "CWE-125 Out-of-bounds Read",
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"lang": "en",
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"cweId": "CWE-125",
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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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"source": {
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"discovery": "INTERNAL"
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},
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"affected": [
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{
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"vendor": "Apache Software Foundation",
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"product": "Apache bRPC",
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"packageURL": "pkg:github/apache/brpc",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "1.18.0",
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"versionType": "semver"
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}
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],
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"defaultStatus": "unaffected",
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"collectionURL": "https://github.com",
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"packageName": "apache/brpc"
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}
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],
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"descriptions": [
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{
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"value": "The Discovery naming-service reply parser in Apache bRPC (versions < 1.18.0) calls RapidJSON object-only accessors (FindMember) on JSON values without first validating that those values are objects. A malformed Discovery response whose data/service members or instances list contain non-object entries (e.g. a bare integer) triggers the RapidJSON object-access precondition on the client, reading memory out of bounds and potentially crashing the bRPC client.\n\nRoot Cause:\nIn src/brpc/policy/discovery_naming_service.cpp, DiscoveryNamingService::GetServers() and DiscoveryNames::ListDiscoveryNodes() access JSON values with member functions on non-object values. RapidJSON only defines these operations for object types; invoking them on a non-object violates the class invariant and results in undefined behavior (out-of-bounds read), commonly crashing the process.\n\nAffected Scenarios: \nAn operator-configured (or compromised) Discovery backend returns a malformed /discovery/nodes or /discovery/fetchs response whose data/service/instance entries are not JSON objects, crashing any bRPC client that refreshes its server list.\n\nHow to Fix:\n1. Upgrade bRPC to version 1.18.0 or later, which fixes this issue.\n2. Apply this patch: https://github.com/apache/brpc/pull/3533\n\nThe fix validates that the Discovery response data, per-service data, and instance entries are JSON objects (and skips non-object node/instance entries and rejects non-object data/service values) before calling member accessors.",
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"lang": "en",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<pre>The Discovery naming-service reply parser in Apache bRPC (versions < 1.18.0) calls RapidJSON object-only accessors (FindMember) on JSON values without first validating that those values are objects. A malformed Discovery response whose data/service members or instances list contain non-object entries (e.g. a bare integer) triggers the RapidJSON object-access precondition on the client, reading memory out of bounds and potentially crashing the bRPC client.<br><br>Root Cause:<br>In src/brpc/policy/discovery_naming_service.cpp, DiscoveryNamingService::GetServers() and DiscoveryNames::ListDiscoveryNodes() access JSON values with member functions on non-object values. RapidJSON only defines these operations for object types; invoking them on a non-object violates the class invariant and results in undefined behavior (out-of-bounds read), commonly crashing the process.<br><br>Affected Scenarios: <br>An operator-configured (or compromised) Discovery backend returns a malformed /discovery/nodes or /discovery/fetchs response whose data/service/instance entries are not JSON objects, crashing any bRPC client that refreshes its server list.<br><br>How to Fix:<br>1. Upgrade bRPC to version 1.18.0 or later, which fixes this issue.<br>2. Apply this patch: https://github.com/apache/brpc/pull/3533<br><br>The fix validates that the Discovery response data, per-service data, and instance entries are JSON objects (and skips non-object node/instance entries and rejects non-object data/service values) before calling member accessors.</pre>"
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}
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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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"url": "https://github.com/apache/brpc/pull/3533"
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},
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{
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"url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb",
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"tags": [
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"vendor-advisory"
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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": "Textual description of severity",
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"content": {
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"text": "moderate"
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}
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Claude",
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"type": "finder"
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}
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],
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"x_generator": {
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"engine": "Vulnogram 0.2.0"
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 4.3,
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"attackVector": "NETWORK",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "LOW",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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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": "2026-10-26T13:54:35.426140Z",
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"id": "CVE-2026-87849",
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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": "2026-10-26T13:54:40.137Z"
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}
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}
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]
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}
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} |