CVE-2021-3110

published 2021-01-20

CVE-2021-3110: The store system in PrestaShop 1.7.7.0 allows time-based boolean SQL injection via the module=productcomments controller=CommentGrade id_products[] parameter.

Priority P2 72 critical 9.8 CVSS 3.1

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

EXPLOIT

The store system in PrestaShop 1.7.7.0 allows time-based boolean SQL injection via the module=productcomments controller=CommentGrade id_products[] parameter.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
prestashop	prestashop	—	—

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

url /index.php?fc=module&module=productcomments&controller=CommentGrade&id_products[]=1%20AND%20(SELECT%203875%20FROM%20(SELECT(SLEEP(8)))xoOt)↗

url /module/productcomments/CommentGrade?id_products[]=1*if(now()=sysdate()%2Csleep(8)%2C0)↗

command SELECT 3875 FROM (SELECT(SLEEP(8)))xoOt↗

command 1*if(now()=sysdate(),sleep(8),0)↗

• → Detect time-based blind SQLi attempts targeting PrestaShop productcomments module via the id_products[] parameter with SLEEP payloads; flag requests where response duration >= 8 seconds. ↗
• → Monitor HTTP GET requests to /index.php with query parameters fc=module, module=productcomments, controller=CommentGrade, and id_products[] containing SQL injection payloads (e.g., SLEEP, IF, SYSDATE). ↗
• → Also monitor the alternate route /module/productcomments/CommentGrade with id_products[] parameter for time-based SQLi payloads using IF(NOW()=SYSDATE(),SLEEP(N),0) pattern. ↗
• → A successful exploitation response body contains the string 'average_grade'; correlate with slow response times to confirm exploitation. ↗
• → Use Shodan query to identify exposed PrestaShop instances for proactive asset identification. ↗

• · The vulnerability is specific to PrestaShop version 1.7.7.0; other versions are not confirmed affected by this CVE. ↗
• · Detection probes use a SLEEP(8) threshold; adjust timeout and duration thresholds to match your environment's baseline latency to avoid false positives or missed detections. ↗
• · The exploit requires no authentication (PR:N, UI:N), meaning any unauthenticated remote attacker can trigger the injection via the productcomments module endpoint. ↗

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 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

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