150 lines
7.8 KiB
JSON
150 lines
7.8 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-2026-90484",
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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": "2026-09-12T04:06:06.138Z",
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"datePublished": "2026-10-21T12:19:37.796Z",
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"dateUpdated": "2026-10-26T13:39:12.101Z"
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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": "2026-10-21T12:19:37.796Z"
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},
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"title": "Apache bRPC: Null pointer dereference in MySQL reply parser leading to client crash",
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"problemTypes": [
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{
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"descriptions": [
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{
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"description": "CWE-476 NULL Pointer Dereference",
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"lang": "en",
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"cweId": "CWE-476",
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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": "<= 1.11.0",
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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 MySQL client response parser in Apache bRPC dereferences a null pointer when the server peer sends a zero-payload-length response packet. A response packet whose declared payload length is zero is accepted by the frame-length check (is_full_package), after which the parser reads the response type byte via an unbounded 5-byte fetch that returns nullptr, and type = p[4] dereferences it, crashing the client process.\n\n\n\nRoot Cause: In brpc::policy::MysqlReply::ConsumePartialIOBuf, buf.fetch(header, 5) returns nullptr when the buffered data only holds the 4-byte header of a zero-length packet, then the code reads p[4] (and, in the fast-auth path, p2[4]) without checking for a null or zero-length packet.\n\n\n\nAffected Scenarios: A brpc MySQL client connecting to a malicious or compromised MySQL server (or a MITM) can be crashed by a zero-length server response packet, resulting in denial of service of the client.\n\n\n\nFix: The fix rejects zero-length response packets (returning PARSE_ERROR_ABSOLUTELY_WRONG) both for the initial response type determination and after a fast-auth marker, before reading the type byte. Upgrade to the Apache bRPC version 1.18.0 or apply the PR patch at https://github.com/apache/brpc/pull/3536.",
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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": "<p>The MySQL client response parser in Apache bRPC dereferences a null pointer when the server peer sends a zero-payload-length response packet. A response packet whose declared payload length is zero is accepted by the frame-length check (is_full_package), after which the parser reads the response type byte via an unbounded 5-byte fetch that returns nullptr, and type = p[4] dereferences it, crashing the client process.</p><p>Root Cause: In brpc::policy::MysqlReply::ConsumePartialIOBuf, buf.fetch(header, 5) returns nullptr when the buffered data only holds the 4-byte header of a zero-length packet, then the code reads p[4] (and, in the fast-auth path, p2[4]) without checking for a null or zero-length packet.</p><p>Affected Scenarios: A brpc MySQL client connecting to a malicious or compromised MySQL server (or a MITM) can be crashed by a zero-length server response packet, resulting in denial of service of the client.</p><p>Fix: The fix rejects zero-length response packets (returning PARSE_ERROR_ABSOLUTELY_WRONG) both for the initial response type determination and after a fast-auth marker, before reading the type byte. Upgrade to the Apache bRPC version 1.18.0 or apply the PR patch at https://github.com/apache/brpc/pull/3536.</p>"
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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/3536",
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"name": "PR 3536"
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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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"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": 6.5,
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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:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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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": "2026-10-26T13:39:08.583202Z",
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"id": "CVE-2026-90484",
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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": "2026-10-26T13:39:12.101Z"
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}
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}
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]
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}
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} |