CVE-2023-44794: Dromara Sa-Token Privilege Escalation

CVE-2023-44794 Overview

CVE-2023-44794 is a privilege escalation vulnerability affecting Dromara SaToken version 1.36.0 and earlier. This vulnerability allows remote attackers to escalate privileges by crafting a malicious payload within the URL. The flaw stems from improper access control mechanisms (CWE-284), enabling unauthorized users to gain elevated permissions within applications utilizing this authentication framework.

Critical Impact

Remote attackers can exploit this vulnerability to escalate privileges without authentication, potentially gaining full administrative access to affected applications. The network-accessible attack vector with no required privileges makes this vulnerability particularly dangerous for internet-facing applications.

Affected Products

• Dromara Sa-Token version 1.36.0 and earlier
• VMware Spring Boot (when used with vulnerable Sa-Token versions)
• VMware Spring Framework (when used with vulnerable Sa-Token versions)

Discovery Timeline

• 2023-10-25 - CVE-2023-44794 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2023-44794

Vulnerability Analysis

This vulnerability exists within Dromara SaToken, a lightweight Java authentication and authorization framework commonly used in Spring Boot and Spring Framework applications. The flaw lies in improper access control validation when processing URL-based requests.

When an attacker crafts a specially formatted URL payload, the authentication framework fails to properly validate and enforce access controls. This allows the attacker to bypass intended authorization restrictions and escalate their privileges to higher-level roles, potentially including administrative access.

The vulnerability is particularly concerning because it requires no prior authentication or user interaction to exploit. Attackers can remotely target any application using the vulnerable SaToken versions through network requests containing the malicious URL payload.

Root Cause

The root cause of CVE-2023-44794 is improper access control (CWE-284) within the SaToken authentication framework. The URL parsing and validation logic fails to properly sanitize and verify authorization tokens or role-based access controls when processing certain crafted URL patterns. This allows attackers to manipulate URL parameters in ways that bypass the intended privilege checks.

Attack Vector

The attack is executed remotely over the network through HTTP/HTTPS requests. An attacker crafts a malicious URL payload targeting endpoints protected by SaToken authentication. The payload exploits the improper access control flaw to trick the framework into granting elevated privileges to the attacker's session.

The attack sequence typically involves:

1. Identifying an application using SaToken authentication
2. Crafting a URL with a malicious payload designed to bypass privilege checks
3. Sending the crafted request to the target application
4. Gaining unauthorized access with escalated privileges

For technical details on the vulnerability mechanism, refer to the GitHub Issue Discussion.

Detection Methods for CVE-2023-44794

Indicators of Compromise

• Unusual URL patterns containing encoded or malformed authentication tokens in request logs
• Unexpected privilege escalation events in application audit logs
• User sessions gaining administrative or elevated access without proper authentication flow
• Anomalous access patterns to protected resources from unauthenticated or low-privilege accounts

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block malformed URL patterns targeting authentication endpoints
• Monitor application logs for privilege escalation events that bypass normal authentication workflows
• Deploy runtime application self-protection (RASP) to detect in-memory exploitation attempts
• Review access control audit trails for sessions gaining privileges without corresponding authorization events

Monitoring Recommendations

• Enable verbose logging for SaToken authentication events and privilege changes
• Configure alerting on any administrative privilege grants outside normal business processes
• Monitor network traffic for unusual request patterns to authentication endpoints
• Implement anomaly detection for user session behavior indicating privilege escalation

How to Mitigate CVE-2023-44794

Immediate Actions Required

• Upgrade Dromara SaToken to a version newer than 1.36.0 that addresses this vulnerability
• Audit current user sessions and privileges for any signs of unauthorized escalation
• Review application logs for evidence of exploitation attempts
• Implement additional access control layers as defense-in-depth while patching

Patch Information

The vulnerability affects Dromara SaToken version 1.36.0 and all prior versions. Organizations should upgrade to the latest version of SaToken that contains the security fix. Detailed information about the vulnerability and remediation can be found in the GitHub Issue Discussion.

Workarounds

• Implement network-level access controls to restrict access to affected applications from untrusted networks
• Deploy a web application firewall with custom rules to filter malicious URL patterns
• Add additional authorization checks at the application layer independent of SaToken
• Consider temporarily disabling or restricting access to sensitive functionality until patching is complete

# Configuration example - Update SaToken dependency in Maven pom.xml
# Replace vulnerable version with patched version
# In pom.xml, update the sa-token-spring-boot-starter dependency:
# <dependency>
#     <groupId>cn.dev33</groupId>
#     <artifactId>sa-token-spring-boot-starter</artifactId>
#     <version>[PATCHED_VERSION]</version>
# </dependency>

# Verify current SaToken version in use
mvn dependency:tree | grep sa-token

# After updating, rebuild and redeploy the application
mvn clean install