CVE-2024-49053
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into Microsoft Dynamics 365 Sales, which execute when viewed by other users. It affects organizations using vulnerable versions of Dynamics 365 Sales, potentially compromising user sessions and data integrity.
💻 Affected Systems
- Microsoft Dynamics 365 Sales
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, leading to data theft or account takeover.
Likely Case
Attackers inject malicious scripts that steal user credentials or session tokens when legitimate users view compromised content.
If Mitigated
With proper input validation and output encoding, the risk is reduced to minimal, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation typically requires some level of user interaction, such as viewing malicious content, but is straightforward once initial access is gained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's update guide for the specific patched version; updates are typically rolled out automatically for cloud deployments.
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49053
Restart Required: No
Instructions:
1. For cloud deployments: Ensure automatic updates are enabled; no action required if using default settings. 2. For on-premises: Apply the latest security update from Microsoft's update catalog or through your update management system.
🔧 Temporary Workarounds
Enable Content Security Policy (CSP)
allImplement a strict CSP to block inline scripts and unauthorized sources, reducing the impact of script injection.
Input Validation and Output Encoding
allEnsure all user inputs are validated and outputs are properly encoded to prevent script execution.
🧯 If You Can't Patch
- Restrict user permissions to minimize the attack surface; limit who can create or modify content in Dynamics 365 Sales.
- Monitor for unusual activity, such as unexpected script tags or redirects in user-generated content logs.
🔍 How to Verify
Check if Vulnerable:
Review your Dynamics 365 Sales version against Microsoft's advisory; for cloud deployments, check the update status in the admin center.Check Version:
Not applicable for cloud SaaS; for on-premises, use PowerShell: Get-Command -Module Microsoft.Dynamics365Verify Fix Applied:
Confirm that the latest security update has been applied by checking the version in the Dynamics 365 admin portal or system settings.📡 Detection & Monitoring
Log Indicators:
- Log entries showing script injection attempts in user content or form submissions
- Unexpected redirects or script executions in audit logs
Network Indicators:
- HTTP requests with malicious script payloads to Dynamics 365 endpoints
- Outbound connections to suspicious domains triggered by injected scripts
SIEM Query:
Example: source="dynamics365" AND (message="*script*" OR message="*alert*" OR message="*eval*")