CVE-2017-20277: Blind SQL Injection in Joomla JoomRecipe 1.0.4 Search

Technical summary

CVE-2017-20277 is a blind SQL injection vulnerability residing in the search_author parameter of JoomRecipe 1.0.4's search results endpoint. The component fails to properly sanitize or parameterize user-supplied input in POST requests, allowing attackers to inject arbitrary SQL code. Because the application does not return SQL error messages to the attacker, exploitation relies on boolean-based inference—crafting conditional queries that alter page content or response timing to deduce database structure and extract data. The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Business impact

A compromised database exposes recipe data, user accounts, and potentially sensitive configuration information stored within the Joomla installation. While the vulnerability does not permit direct data modification or system availability impacts, the high confidentiality impact means attackers can systematically harvest usernames, email addresses, password hashes, and any custom fields in the JoomRecipe database. For recipe sharing or community-driven recipe sites, this leads to customer trust erosion and potential regulatory exposure under data protection frameworks like GDPR if personal data is involved.

Affected systems

Joomla installations with the JoomRecipe component version 1.0.4 are directly affected. The vulnerability is network-accessible and requires no authentication, so any public-facing Joomla site running this specific component version is at risk. Verify your inventory against Joomla's official extension directory and your site's component manifest to confirm if JoomRecipe 1.0.4 is deployed.

Exploitability

This vulnerability scores high on exploitability: it requires no authentication, no user interaction, and is trivial to execute over HTTP/HTTPS using basic POST request manipulation. Blind SQL injection attacks are well-understood and tooling (e.g., sqlmap) can automate the extraction process. The attack surface is the public search endpoint, making it immediately discoverable by reconnaissance. However, blind SQL injection is slower and more cumbersome than error-based or union-based variants, so extracting large datasets requires patience or specialized automation.

Remediation

Immediate action: disable or uninstall JoomRecipe 1.0.4 if it is not actively required. If the component is essential, check the vendor's repository and Joomla Extensions Directory for a patched version (verify against the official JoomRecipe project for the latest release and changelog). If no patch is available, isolate the component by restricting search functionality via web application firewall rules, or apply input validation filters at the application layer. Long-term: ensure all Joomla extensions undergo security review during procurement and are kept current with vendor updates.

Patch guidance

Visit the official JoomRecipe project repository or the Joomla Extensions Directory to confirm availability of a version later than 1.0.4. Verify the changelog explicitly addresses SQL injection in the search_author parameter before upgrading. Test the patch in a staging environment to confirm search functionality remains intact. After patching, audit database access logs and consider rotating database credentials if the system was exposed for an extended period.

Detection guidance

Monitor web server logs and database query logs for signs of SQL injection attempts in the search endpoint: look for unusual characters (quotes, semicolons, SQL keywords like UNION, AND, OR) in POST parameters, especially search_author. Watch for repeated requests with incrementally modified parameters—a hallmark of blind SQL injection enumeration. Implement Web Application Firewall (WAF) rules to block common SQL injection payloads before they reach the application. Enable query logging on the database server to capture suspicious query patterns. A SIEM configured to alert on anomalous database activity (e.g., multiple failed login attempts, unexpected table scans) can provide early warning.

Why prioritize this

This vulnerability merits urgent remediation due to its high CVSS score (8.2) and the ease with which it can be exploited. The combination of network accessibility, no authentication requirement, and high confidentiality impact (database information disclosure) makes it an attractive target for opportunistic attackers scanning the internet for vulnerable Joomla installations. Although it does not enable direct system compromise or denial of service, the data exfiltration risk justifies rapid patching or mitigation.

Risk score, explained

The CVSS 3.1 score of 8.2 (HIGH) reflects: network-based attack vector (AV:N), low attack complexity (AC:L), no privilege requirements (PR:N), no user interaction (UI:N), and unchanged scope (S:U). The impact metrics show high confidentiality (C:H) due to database information exposure, low integrity impact (I:L) because the attacker cannot modify data in most blind SQL injection scenarios, and no availability impact (A:N). The high confidentiality component and ease of exploitation justify the elevated severity.

Frequently asked questions