CVE-2022-1650
📋 TL;DR
CVE-2022-1650 is an information exposure vulnerability in the eventsource JavaScript library where sensitive information (like authentication tokens) isn't properly removed before being stored or transferred. This affects applications using eventsource prior to v2.0.2 that handle sensitive data via EventSource connections. Attackers could potentially intercept or access this exposed information.
💻 Affected Systems
- eventsource JavaScript library
📦 What is this software?
Eventsource by Eventsource
Eventsource by Eventsource
⚠️ Risk & Real-World Impact
Worst Case
Authentication tokens, session cookies, or other sensitive credentials are exposed to unauthorized parties, leading to account takeover, data breaches, or lateral movement within systems.
Likely Case
Exposure of sensitive information in logs, error messages, or network traffic that could be harvested by attackers with access to these systems.
If Mitigated
Limited exposure of non-critical information with proper input validation and output encoding in place.
🎯 Exploit Status
The vulnerability is in the library's handling of sensitive data, making exploitation straightforward once an attacker identifies vulnerable implementations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.0.2
Vendor Advisory: https://github.com/eventsource/eventsource/commit/10ee0c4881a6ba2fe65ec18ed195ac35889583c4
Restart Required: No
Instructions:
1. Update package.json to specify 'eventsource': '>=2.0.2'. 2. Run 'npm update eventsource' or 'yarn upgrade eventsource'. 3. Test your application's EventSource functionality.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict input validation and output encoding for all data passed through EventSource connections
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using vulnerable eventsource versions
- Deploy web application firewalls (WAF) with rules to detect sensitive data leakage patterns
🔍 How to Verify
Check if Vulnerable:
Check package.json or package-lock.json for eventsource version. If version is <2.0.2, the system is vulnerable.Check Version:
npm list eventsource | grep eventsourceVerify Fix Applied:
Verify eventsource version is >=2.0.2 using 'npm list eventsource' or checking package.json.📡 Detection & Monitoring
Log Indicators:
- Unexpected sensitive data in application logs
- Error messages containing authentication tokens or credentials
Network Indicators:
- Sensitive data visible in plaintext in Server-Sent Events traffic
- Unexpected data patterns in SSE connections
SIEM Query:
source="application_logs" AND ("authentication_token" OR "session_cookie" OR "password") AND "EventSource"🔗 References
- https://github.com/eventsource/eventsource/commit/10ee0c4881a6ba2fe65ec18ed195ac35889583c4
- https://huntr.dev/bounties/dc9e467f-be5d-4945-867d-1044d27e9b8e
- https://lists.debian.org/debian-lts-announce/2022/12/msg00021.html
- https://github.com/eventsource/eventsource/commit/10ee0c4881a6ba2fe65ec18ed195ac35889583c4
- https://huntr.dev/bounties/dc9e467f-be5d-4945-867d-1044d27e9b8e
- https://lists.debian.org/debian-lts-announce/2022/12/msg00021.html
