CVE-2024-0857: FlexWater Water Management SQLi Flaw

CVE-2024-0857 Overview

CVE-2024-0857 is a SQL injection vulnerability in Universal Software Inc. (Uni-yaz) FlexWater Corporate Water Management. The flaw affects all versions prior to 5.452.0 and stems from improper neutralization of special elements used in SQL commands [CWE-89]. Remote attackers can inject arbitrary SQL statements without authentication or user interaction. Successful exploitation compromises database confidentiality, integrity, and availability. FlexWater is deployed by municipal and corporate utilities to manage water billing and customer records, making the database a high-value target.

Critical Impact
Unauthenticated network attackers can execute arbitrary SQL queries against the FlexWater backend database, enabling data theft, record manipulation, and potential full database takeover.

Affected Products

Uni-yaz FlexWater Corporate Water Management versions before 5.452.0
Deployments exposing the FlexWater web interface to untrusted networks
Installations that have not applied the vendor-provided fix referenced in USOM TR-24-1011

Discovery Timeline

2024-07-18 - CVE-2024-0857 published to the National Vulnerability Database (NVD)
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-0857

Vulnerability Analysis

The vulnerability is a SQL injection flaw in FlexWater Corporate Water Management, an application used to manage corporate water utility operations. The product fails to properly neutralize special characters in user-supplied input before incorporating that input into SQL statements. Attackers can submit crafted parameters that alter the structure of backend queries.

Because the attack vector is network-based and requires no privileges or user interaction, an attacker only needs reachability to the application to exploit it. Compromise of the database can expose customer billing data, meter readings, financial records, and authentication material. Attackers can also modify or delete records, supporting fraud or service disruption against utility operations.

Root Cause

The root cause is the construction of SQL queries through direct concatenation or unsafe interpolation of untrusted input. The application does not employ parameterized queries or prepared statements, and input validation routines do not strip or escape SQL metacharacters before query execution.

Attack Vector

An unauthenticated remote attacker sends HTTP requests containing SQL payloads in vulnerable parameters. The injected payload is executed by the backend database engine in the application context. Typical exploitation includes UNION-based extraction, boolean-based blind retrieval, time-based blind enumeration, and stacked statements depending on the database driver in use. Specific vulnerable endpoints are not disclosed in the public advisory. Refer to the USOM Security Notification TR-24-1011 for vendor-coordinated details.

Detection Methods for CVE-2024-0857

Indicators of Compromise

HTTP request logs containing SQL metacharacters such as ', ", --, ;, UNION SELECT, OR 1=1, or URL-encoded equivalents in FlexWater request parameters
Database error messages returned in HTTP responses referencing SQL syntax, ODBC drivers, or table names
Unusual query patterns in database audit logs originating from the FlexWater service account, including queries against information_schema or system catalog tables
Spikes in response time on specific endpoints, suggesting time-based blind SQL injection probing

Detection Strategies

Deploy web application firewall (WAF) signatures for known SQL injection patterns targeting FlexWater request parameters
Enable database query logging and alert on queries containing tautologies, stacked statements, or schema enumeration
Correlate web server access logs with database audit logs to identify request-to-query injection chains

Monitoring Recommendations

Monitor authentication and administrative tables for unauthorized reads or modifications
Track outbound data volume from the FlexWater database host to detect bulk exfiltration
Alert on creation of new database users, role grants, or xp_cmdshell-style procedure calls following suspicious web requests

How to Mitigate CVE-2024-0857

Immediate Actions Required

Upgrade FlexWater Corporate Water Management to version 5.452.0 or later as directed by the vendor
Restrict network exposure of the FlexWater web interface to trusted management networks and VPN users only
Rotate database credentials and application secrets if compromise is suspected, and review database accounts for unauthorized additions

Patch Information

Uni-yaz has released FlexWater Corporate Water Management version 5.452.0, which remediates the SQL injection flaw. Consult the USOM Security Notification TR-24-1011 for vendor coordination details and apply the update on all FlexWater instances. Validate the patch in a staging environment, then schedule production deployment with rollback procedures in place.

Workarounds

Place the FlexWater application behind a WAF with SQL injection signatures enabled in blocking mode
Apply the principle of least privilege to the FlexWater database account, removing DDL and administrative permissions where not required
Disable or firewall any public-facing FlexWater endpoints until the patch can be deployed

bash

# Configuration example: restrict FlexWater web access at the network edge
# Replace 10.0.0.0/8 with your trusted management network
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP