CVE-2017-20277 Overview
CVE-2017-20277 is a blind SQL injection vulnerability in the Joomla JoomRecipe extension version 1.0.4. The flaw resides in the search_author parameter on the search results page. Attackers send crafted POST requests to the search endpoint to inject SQL syntax into the underlying query. The component fails to sanitize user-supplied input before incorporating it into database statements. Exploitation uses boolean-based blind SQL injection techniques to infer database content one bit at a time. The vulnerability is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command.
Critical Impact
Unauthenticated remote attackers can extract sensitive database contents from any Joomla site running JoomRecipe 1.0.4, including user records and configuration data.
Affected Products
- Joomla JoomRecipe component version 1.0.4
- Joomla CMS installations with the JoomRecipe extension enabled
- JoomBoost-distributed JoomRecipe deployments exposing the search endpoint
Discovery Timeline
- 2017 - Proof-of-concept published as Exploit-DB #42347
- 2026-06-19 - CVE-2017-20277 published to NVD
- 2026-06-23 - Last updated in NVD database
Technical Details for CVE-2017-20277
Vulnerability Analysis
The JoomRecipe component exposes a recipe search feature that accepts an author filter. The search_author POST parameter is concatenated directly into a SQL query without parameterization or escaping. Attackers send boolean payloads that alter the query's WHERE clause and observe response differences to extract data. Because the injection is blind, the server does not return database errors or query output directly. Instead, attackers infer results from differences in HTTP response content for true and false conditions. Automated tooling such as sqlmap can extract entire database tables through repeated boolean inference. The vulnerable endpoint requires no authentication, allowing exploitation against any internet-exposed Joomla site running the affected extension.
Root Cause
The root cause is direct concatenation of unsanitized HTTP input into a SQL statement. The component does not use prepared statements, parameterized queries, or input validation routines provided by the Joomla database API. This pattern matches [CWE-89] and is a classic failure to neutralize special characters before query construction.
Attack Vector
The attack vector is network-based. An attacker submits a POST request to the JoomRecipe search results page with a malicious search_author value containing SQL fragments such as boolean logic operators and SQL comments. The application reflects the payload into the backend query, and the attacker observes content differences in the rendered search results to extract data byte by byte. See the VulnCheck Advisory on Joomla JoomRecipe and the Exploit-DB entry for technical reproduction details. No verified code samples are included here; refer to the referenced advisory for payload structure.
Detection Methods for CVE-2017-20277
Indicators of Compromise
- POST requests to JoomRecipe search endpoints containing SQL keywords such as SELECT, UNION, SLEEP, AND 1=1, or OR 1=2 in the search_author parameter
- High volumes of near-identical POST requests differing only by single-character changes, indicating automated blind extraction
- Unexpected Joomla database read activity originating from web server processes outside of normal application flow
Detection Strategies
- Inspect web server access logs for POST requests targeting the JoomRecipe search route with suspicious search_author payloads
- Deploy a web application firewall rule set covering [CWE-89] SQL injection patterns against the affected endpoint
- Correlate web request anomalies with database query telemetry to identify sustained boolean-based extraction patterns
Monitoring Recommendations
- Enable verbose request logging on Joomla front-end controllers and forward logs to a centralized analytics platform
- Alert on long-running or high-frequency requests to JoomRecipe URLs from a single source IP
- Monitor MySQL or MariaDB slow query logs for repeated queries against recipe author tables with unusual WHERE clauses
How to Mitigate CVE-2017-20277
Immediate Actions Required
- Disable or uninstall the JoomRecipe 1.0.4 extension until a patched version is confirmed by the vendor
- Restrict access to the JoomRecipe search endpoint at the web server or WAF layer
- Review database audit logs and Joomla user tables for evidence of unauthorized data access
Patch Information
No vendor patch is listed in the NVD record for CVE-2017-20277. Administrators should consult the JoomBoost homepage and the Joomla Extensions Directory listing for JoomRecipe to determine whether a fixed release is available. If no patched version exists, remove the extension.
Workarounds
- Deploy a WAF signature blocking SQL metacharacters and keywords in the search_author POST parameter
- Apply Joomla file-level access controls to deny direct requests to JoomRecipe search components
- Implement rate limiting on the search endpoint to slow automated blind injection tooling
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
