135 lines
6.1 KiB
JSON
135 lines
6.1 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-2026-52735",
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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": "2026-06-08T14:00:43.572Z",
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"datePublished": "2026-08-18T19:23:10.705Z",
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"dateUpdated": "2026-08-18T19:48:45.150Z"
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},
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"containers": {
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"cna": {
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"title": "ZEBRA: Consensus divergence via P2SH sigop undercount in pure-Rust disabled-opcode parser",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-684",
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"lang": "en",
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"description": "CWE-684: Incorrect Provision of Specified Functionality",
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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": "HIGH",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "HIGH",
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"subAvailabilityImpact": "HIGH",
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"baseScore": 9.3,
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"baseSeverity": "CRITICAL",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H",
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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/ZcashFoundation/zebra/security/advisories/GHSA-gf9r-m956-97qx",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-gf9r-m956-97qx"
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},
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{
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"name": "https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd"
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},
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{
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"name": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0"
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}
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],
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"affected": [
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{
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"vendor": "ZcashFoundation",
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"product": "zebra",
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"versions": [
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{
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"version": "< 4.5.0",
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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": "2026-08-18T19:23:10.705Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, Zebra can accept a block that zcashd rejects because the P2SH signature-operation counter undercounts redeem scripts containing a disabled opcode followed by signature opcodes. In zebra-script/src/lib.rs, p2sh_input_sigop_count used the pure-Rust script::Code::sig_op_count path, whose try_fold parser stops at disabled opcodes such as OP_CODESEPARATOR and returns only the partial count accumulated before the error. The zcashd reference implementation continues static signature-operation counting through disabled opcodes, so an attacker can broadcast P2SH spends that Zebra counts below MAX_BLOCK_SIGOPS while zcashd counts above the 20,000-operation limit. If a Zebra miner includes those transactions, Zebra validators accept the block while zcashd validators reject it, creating a consensus chain split that affects network integrity and availability without requiring the attacker to produce a block. This issue is fixed in version 4.5.0."
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}
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],
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"source": {
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"advisory": "GHSA-gf9r-m956-97qx",
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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": "2026-08-18T19:48:36.850142Z",
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"id": "CVE-2026-52735",
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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": "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": "2026-08-18T19:48:45.150Z"
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}
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}
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]
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}
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} |