CVE-2023-22501
📋 TL;DR
This authentication vulnerability in Jira Service Management allows attackers to impersonate users and gain unauthorized access by intercepting signup tokens. It affects instances with write access to User Directory and outgoing email enabled, particularly impacting bot accounts and external customer accounts in SSO environments. Attackers can exploit this if they're included on issues/requests with target users or gain access to emails containing 'View Request' links.
💻 Affected Systems
- Jira Service Management Server
- Jira Service Management Data Center
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover leading to unauthorized access to sensitive data, privilege escalation, and potential lateral movement within the Jira instance.
Likely Case
Unauthorized access to specific user accounts, particularly bot accounts or external customer accounts, allowing attackers to view/modify tickets and potentially access sensitive information.
If Mitigated
Limited impact with proper email security controls, user directory restrictions, and monitoring for suspicious account activity.
🎯 Exploit Status
Requires specific conditions: write access to User Directory, outgoing email enabled, and access to signup tokens via email or issue inclusion.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Atlassian advisory for specific fixed versions
Vendor Advisory: https://jira.atlassian.com/browse/JSDSERVER-12312
Restart Required: Yes
Instructions:
1. Check Atlassian advisory for exact fixed versions. 2. Backup your Jira instance. 3. Apply the security patch/upgrade to fixed version. 4. Restart Jira Service Management. 5. Verify the fix.
🔧 Temporary Workarounds
Disable outgoing email
allTemporarily disable outgoing email functionality to prevent token transmission
Restrict User Directory write access
allLimit write access to User Directory to only necessary administrators
🧯 If You Can't Patch
- Implement strict email security controls and monitoring for suspicious emails
- Review and restrict User Directory permissions, especially write access
🔍 How to Verify
Check if Vulnerable:
Check Jira version against Atlassian advisory and verify if write access to User Directory and outgoing email are enabledCheck Version:
Check Jira administration panel or run appropriate version check command for your installationVerify Fix Applied:
Verify Jira version is updated to patched version and test authentication flows📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from unusual locations
- Account access from unexpected IP addresses
- Unusual token generation or usage patterns
Network Indicators:
- Unusual email traffic patterns
- Suspicious authentication requests
SIEM Query:
Search for authentication events from unusual locations or multiple account access attempts within short timeframes