CVE-2021-27320

published 2021-03-24

CVE-2021-27320: Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert malicious SQL queries via firstname…

Priority P2 67 high 7.5 CVSS 3.1

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

EXPLOIT

Blind SQL injection in contactus.php in Doctor Appointment System 1.0 allows an unauthenticated attacker to insert malicious SQL queries via firstname parameter.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
doctor_appointment_system_project	doctor_appointment_system	—	—

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

path /contactus.php↗

command firstname=test'+AND+(SELECT+6133+FROM+(SELECT(SLEEP(6)))nOqb)+AND+'RiUU'='RiUU↗

• → Detect blind time-based SQL injection attempts against contactus.php: look for POST requests to /contactus.php containing SLEEP() in the firstname parameter body. ↗
• → Response body containing 'Medical Management System' with HTTP 500 status on POST to /contactus.php may indicate successful SQLi triggering an error condition. ↗
• → Time-based detection: if the server response to POST /contactus.php takes >= 6 seconds, a SLEEP-based blind SQLi payload in the firstname parameter is likely being executed. ↗

• · The exploit targets only Doctor Appointment System version 1.0; other versions are not confirmed vulnerable. ↗
• · The attack requires no authentication (PR:N, UI:N), meaning any unauthenticated network request to /contactus.php is a valid attack vector. ↗

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N

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