CVE-2020-15505: MobileIron Core RCE Vulnerability

CVE-2020-15505 Overview

A critical remote code execution vulnerability exists in MobileIron Core & Connector, Sentry, and Monitor and Reporting Database (RDB) products. This vulnerability allows remote attackers to execute arbitrary code via unspecified vectors without requiring authentication, user interaction, or privileges. The flaw affects enterprise mobile device management (MDM) infrastructure, making it particularly dangerous for organizations relying on MobileIron for securing their mobile device fleet.

Critical Impact

This vulnerability enables unauthenticated remote code execution on MobileIron MDM servers, potentially allowing attackers to compromise the entire mobile device management infrastructure and gain access to sensitive enterprise data. This CVE is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild.

Affected Products

• MobileIron Core versions 10.3.0.3 and earlier, 10.4.0.0-10.4.0.3, 10.5.1.0, 10.5.2.0, and 10.6.0.0
• MobileIron Enterprise Connector versions 10.3.0.3 and earlier, 10.4.0.0-10.4.0.3, 10.5.1.0, 10.5.2.0, and 10.6.0.0
• MobileIron Sentry versions 9.7.2 and earlier, and 9.8.0
• MobileIron Monitor and Reporting Database (RDB) version 2.0.0.1 and earlier

Discovery Timeline

• July 7, 2020 - CVE-2020-15505 published to NVD
• November 7, 2025 - Last updated in NVD database

Technical Details for CVE-2020-15505

Vulnerability Analysis

CVE-2020-15505 is a remote code execution vulnerability that exploits insecure deserialization in MobileIron's MDM platform. According to technical analysis from Packet Storm Security, the vulnerability leverages Hessian-based Java deserialization, which allows attackers to inject malicious serialized objects that are processed by the server without proper validation.

The attack requires no authentication and can be executed remotely over the network. Since MobileIron MDM servers are typically internet-facing to manage mobile devices, this significantly increases the attack surface and risk exposure. Successful exploitation grants attackers the ability to execute arbitrary code with the privileges of the MobileIron service, potentially leading to complete system compromise.

This vulnerability is classified under CWE-706 (Use of Incorrectly-Resolved Name or Reference), indicating that the application fails to properly validate or resolve references before processing them. The inclusion in CISA's Known Exploited Vulnerabilities catalog confirms that threat actors have actively weaponized this flaw in real-world attacks.

Root Cause

The root cause of this vulnerability lies in the insecure handling of Hessian-based Java deserialization within MobileIron's MDM components. The application deserializes untrusted data from remote sources without implementing proper input validation or type checking, allowing attackers to craft malicious serialized objects that execute arbitrary code when processed by the server.

Attack Vector

The attack is conducted over the network against internet-exposed MobileIron MDM servers. Attackers craft specially formatted requests containing malicious serialized Java objects that exploit the Hessian deserialization process. When the vulnerable MobileIron service processes these requests, the malicious payload is deserialized and executed, granting the attacker code execution capabilities on the target system.

The vulnerability's network-based attack vector, combined with the lack of authentication requirements, makes this an ideal target for opportunistic attackers scanning for exposed MDM infrastructure.

Detection Methods for CVE-2020-15505

Indicators of Compromise

• Unexpected outbound network connections from MobileIron servers to unknown external IP addresses
• Unusual Java processes spawning shell commands or connecting to external systems
• Anomalous Hessian-formatted HTTP requests to MobileIron endpoints containing serialized object payloads
• Evidence of web shells or persistent backdoors deployed on MobileIron servers

Detection Strategies

• Monitor MobileIron server logs for suspicious HTTP requests containing serialized Java object patterns
• Implement network intrusion detection rules to identify Hessian deserialization exploit attempts
• Deploy endpoint detection and response (EDR) solutions to monitor for post-exploitation activities on MobileIron servers
• Audit MobileIron servers for unauthorized modifications or newly created files

Monitoring Recommendations

• Enable enhanced logging on all MobileIron components and forward logs to a centralized SIEM platform
• Implement real-time alerting for abnormal process execution chains on MobileIron servers
• Monitor network traffic for signs of command-and-control communications originating from MDM infrastructure
• Conduct regular integrity checks on MobileIron application files and configurations

How to Mitigate CVE-2020-15505

Immediate Actions Required

• Immediately apply security patches provided by MobileIron (now Ivanti) for all affected products
• Restrict network access to MobileIron management interfaces using firewall rules and VPN requirements
• Conduct forensic analysis of exposed MobileIron servers to identify potential compromise indicators
• Implement network segmentation to isolate MDM infrastructure from critical internal systems

Patch Information

MobileIron has released security updates to address this vulnerability. Organizations should upgrade to the latest patched versions of all affected products immediately. Refer to the MobileIron Security Updates Blog for official patch information and download links. Given this vulnerability's inclusion in the CISA KEV catalog, federal agencies are mandated to remediate this issue within specified deadlines.

Workarounds

• If immediate patching is not possible, place MobileIron servers behind a VPN to restrict direct internet access
• Implement web application firewall (WAF) rules to filter requests containing serialized Java objects
• Monitor for and block known exploitation patterns at the network perimeter
• Consider temporarily taking vulnerable systems offline if they cannot be adequately protected until patches are applied

# Example firewall rule to restrict MobileIron access to VPN-only
# Adjust interface names and IP ranges for your environment
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP