170 lines
8.6 KiB
JSON
170 lines
8.6 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-2026-77804",
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"assignerOrgId": "f9fea0b6-671e-4eea-8fde-31911902ae05",
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"state": "PUBLISHED",
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"assignerShortName": "ProgressSoftware",
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"dateReserved": "2026-08-21T13:37:35.057Z",
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"datePublished": "2026-10-05T12:40:26.811Z",
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"dateUpdated": "2026-10-06T17:49:23.338Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "f9fea0b6-671e-4eea-8fde-31911902ae05",
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"shortName": "ProgressSoftware",
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"dateUpdated": "2026-10-05T12:40:26.811Z"
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},
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"title": "Time-of-check Time-of-use (TOCTOU) Race Condition in Root Certificate Installation in Progress® Telerik® Fiddler® Classic",
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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-367",
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"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
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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-29",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions"
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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": "Progress Software",
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"product": "Progress® Telerik® Fiddler® Classic",
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"platforms": [
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"Windows"
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],
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"versions": [
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{
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"status": "affected",
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"version": "1.0.0",
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"lessThan": "6.0.20262.10021",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, a time-of-check time-of-use (TOCTOU) race condition exists in the installation of the HTTPS interception root certificate into the Local Computer certificate store. Fiddler writes the certificate to a temporary file in a user-writable location and then launches the external TrustCert helper application, which elevates and imports the certificate from that file. A local threat actor with low privileges who replaces the temporary file between the time it is written and the time the elevated helper reads it can cause an attacker-supplied root certificate to be installed in the Local Computer Trusted Root Certification Authorities store, enabling subsequent interception and modification of TLS-protected traffic on the machine. Successful exploitation requires the user to initiate the certificate trust operation and approve the elevation prompt.",
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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": "In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, a time-of-check time-of-use (TOCTOU) race condition exists in the installation of the HTTPS interception root certificate into the Local Computer certificate store. Fiddler writes the certificate to a temporary file in a user-writable location and then launches the external TrustCert helper application, which elevates and imports the certificate from that file. A local threat actor with low privileges who replaces the temporary file between the time it is written and the time the elevated helper reads it can cause an attacker-supplied root certificate to be installed in the Local Computer Trusted Root Certification Authorities store, enabling subsequent interception and modification of TLS-protected traffic on the machine. Successful exploitation requires the user to initiate the certificate trust operation and approve the elevation prompt."
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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://docs.telerik.com/fiddler/knowledge-base/kb-security-root-certificate-installation-toctou-cve-2026-77804",
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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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"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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "REQUIRED",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "NONE",
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"baseSeverity": "MEDIUM",
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"baseScore": 6.6,
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"
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}
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"value": "Trust the Fiddler Classic certificate only in the Current User certificate store. When the application asks to install the certificate in the Local Computer (local machine) store, choose No. If a machine-wide trust is required, export the certificate to a file and import that file into the Local Computer Trusted Root Certification Authorities store manually.",
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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": "<div>Trust the Fiddler Classic certificate only in the <b>Current User</b> certificate store. When the application asks to install the certificate in the <b>Local Computer</b> (local machine) store, choose <b>No</b>. If a machine-wide trust is required, export the certificate to a file and import that file into the Local Computer Trusted Root Certification Authorities store manually.</div>"
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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": "NATO Cyber Security Centre (NCSC)",
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"type": "finder"
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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 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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-06T17:49:19.748248Z",
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"id": "CVE-2026-77804",
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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": "total"
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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": "2026-10-06T17:49:23.338Z"
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}
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}
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]
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}
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} |