CVE-2019-17508

published 2019-10-11

CVE-2019-17508: On D-Link DIR-859 A3-1.06 and DIR-850 A1.13 devices, /etc/services/DEVICE.TIME.php allows command injection via the $SERVER variable.

Priority P2 74 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

EXPLOIT

On D-Link DIR-859 A3-1.06 and DIR-850 A1.13 devices, /etc/services/DEVICE.TIME.php allows command injection via the $SERVER variable.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
dlink	dir-850l_a_firmware	—	—
dlink	dir-859_a3_firmware	—	—

Detection & IOCs extracted from sources · hover to see the quote

path /etc/services/DEVICE.TIME.php↗

• → Command injection occurs via the $SERVER variable in /etc/services/DEVICE.TIME.php on D-Link DIR-859 A3-1.06 and DIR-850 A1.13 devices; monitor HTTP requests targeting this endpoint for shell metacharacters or command separators in the SERVER parameter. ↗
• → The exploit chain first leverages an unauthenticated credential disclosure vulnerability before executing OS commands as an authenticated user; look for unauthenticated requests to credential-exposing endpoints on DIR-850L devices followed by authenticated command-injection attempts. ↗
• → Meterpreter payloads are not usable against this target; post-exploitation activity will rely on non-Meterpreter reverse shells or bind shells, which may aid in distinguishing attacker tooling during incident response. ↗

• · Affected devices are D-Link DIR-859 firmware A3-1.06 and DIR-850 firmware A1.13 specifically; detections should be scoped to these models and versions to reduce false positives. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-78