172 lines
7.3 KiB
JSON
172 lines
7.3 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-2026-63276",
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"assignerOrgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2",
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"state": "PUBLISHED",
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"assignerShortName": "Document Fdn.",
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"dateReserved": "2026-07-16T08:17:05.512Z",
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"datePublished": "2026-09-22T11:10:32.057Z",
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"dateUpdated": "2026-09-22T12:21:57.496Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2",
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"shortName": "Document Fdn.",
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"dateUpdated": "2026-09-22T11:10:32.057Z"
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},
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"title": "Stack buffer overflow in CFF to Type 1 font conversion",
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"datePublic": "2026-09-21T23:59:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"value": "LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents. A stack buffer overflow existed in that conversion. The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer. In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents.</p><p>A stack buffer overflow existed in that conversion. The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer.</p><p>In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.</p>"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "The Document Foundation",
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"product": "LibreOffice",
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"defaultStatus": "unknown",
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"versions": [
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{
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"status": "affected",
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"version": "26.2",
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"lessThan": "< 26.2.5",
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"versionType": "26.2 series"
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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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"type": "finder",
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"value": "Claude, found by Anthropic using agents to study the security of open-source projects"
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},
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{
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"lang": "en",
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"type": "analyst",
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"value": "Ada Logics, validating and reporting"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Caolán McNamara of Collabora Productivity"
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-787",
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"description": "CWE-787 Out-of-bounds Write",
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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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"impacts": [
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{
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"capecId": "CAPEC-44",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-44 Overflow Binary Resource File"
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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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"format": "CVSS",
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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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"cvssV4_0": {
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "LOW",
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"vulnAvailabilityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "PROOF_OF_CONCEPT",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "MEDIUM",
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"baseScore": 5.4,
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P"
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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://www.libreoffice.org/about-us/security/advisories/cve-2026-63276"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.2"
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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": "2026-09-22T12:21:19.661928Z",
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"id": "CVE-2026-63276",
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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": "2026-09-22T12:21:57.496Z"
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}
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}
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]
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}
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} |