171 lines
7.7 KiB
JSON
171 lines
7.7 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-2026-42374",
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"assignerOrgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
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"state": "PUBLISHED",
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"assignerShortName": "securin",
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"dateReserved": "2026-04-27T06:21:56.902Z",
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"datePublished": "2026-05-04T16:00:15.244Z",
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"dateUpdated": "2026-05-05T12:43:29.118Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
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"shortName": "securin",
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"dateUpdated": "2026-05-04T16:00:15.244Z"
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},
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"title": "D-Link DIR-600L B1 Hardcoded Telnet Backdoor Credentials",
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"datePublic": "2026-04-24T00:00:00.000Z",
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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-798",
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"description": "CWE-798 Use of Hard-coded Credentials",
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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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"affected": [
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{
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"vendor": "D-Link",
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"product": "DIR-600L Firmware",
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"platforms": [
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"MIPS32 Big-Endian"
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],
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"versions": [
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{
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"status": "affected",
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"version": "B1",
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"versionType": "custom"
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}
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],
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"defaultStatus": "affected",
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"cpes": [
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"cpe:2.3:o:dlink:dir-600l_firmware:*:*:*:*:*:*:*:*"
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]
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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": "D-Link DIR-600L Hardware Revision B1 (End-of-Life) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username \"Alphanetworks\" and the static password \"wrgn61_dlwbr_dir600L\" read from /etc/alpha_config/image_sign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control. The device has reached End-of-Life (EOL) and will not receive patches.",
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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>D-Link DIR-600L Hardware Revision B1 (End-of-Life) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username \"Alphanetworks\" and the static password \"wrgn61_dlwbr_dir600L\" read from /etc/alpha_config/image_sign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control. The device has reached End-of-Life (EOL) and will not receive patches.</p>"
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}
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]
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}
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],
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"tags": [
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"unsupported-when-assigned"
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],
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"references": [
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{
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"url": "https://www.securin.io/zero-day/cve-2026-42374-hardcoded-telnet-backdoor-in-d-link-dir-600l-b1-end-of-life-",
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"name": "D-Link DIR-600L B1 Hardcoded Telnet Backdoor - Securin Advisory"
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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": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "HIGH",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.8,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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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": "This product is End-of-Life (EOL) and will NOT receive patches. Users should replace the device. Temporary: connect via backdoor and run \"killall telnetd\" and \"iptables -A INPUT -p tcp --dport 23 -j DROP\" (lost on reboot).",
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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>This product is End-of-Life (EOL) and will NOT receive patches. Users should replace the device. Temporary: connect via backdoor and run \"killall telnetd\" and \"iptables -A INPUT -p tcp --dport 23 -j DROP\" (lost on reboot).</p>"
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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": "Arjun Basnet from Securin Labs",
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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 1.0.2"
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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://www.securin.io/zero-day/cve-2026-42374-hardcoded-telnet-backdoor-in-d-link-dir-600l-b1-end-of-life-",
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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": "2026-05-05T03:56:22.870524Z",
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"id": "CVE-2026-42374",
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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": "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": "2026-05-05T12:43:29.118Z"
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}
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}
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]
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}
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} |