137 lines
6.3 KiB
JSON
137 lines
6.3 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-2026-44905",
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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": "2026-05-07T21:50:33.547Z",
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"datePublished": "2026-05-26T21:18:33.445Z",
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"dateUpdated": "2026-05-27T13:01:57.541Z"
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},
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"containers": {
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"cna": {
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"title": "Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-248",
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"lang": "en",
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"description": "CWE-248: Uncaught Exception",
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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": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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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": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv"
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},
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{
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"name": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0"
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}
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],
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"affected": [
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{
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"vendor": "riebl",
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"product": "vanetza",
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"versions": [
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{
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"version": "< e1a2e2709210d309458c3d77f98d50dec26c0df0",
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"status": "affected"
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},
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{
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"version": "<= 26.02",
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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": "2026-05-26T21:18:33.445Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0."
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}
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],
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"source": {
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"advisory": "GHSA-q9fq-3rx9-7xcv",
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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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"references": [
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{
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"url": "https://github.com/riebl/vanetza/security/advisories/GHSA-q9fq-3rx9-7xcv",
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"tags": [
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"exploit"
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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": "ssvc",
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"content": {
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"timestamp": "2026-05-27T13:01:15.575636Z",
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"id": "CVE-2026-44905",
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"options": [
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{
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"Exploitation": "poc"
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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": "2026-05-27T13:01:57.541Z"
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}
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}
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]
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}
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} |