CVE-2023-22260
📋 TL;DR
This vulnerability allows a low-privilege authenticated attacker to redirect users to malicious websites via an open redirect flaw in Adobe Experience Manager. It affects versions 6.5.15.0 and earlier, requiring user interaction for exploitation. The risk is primarily to users who might be tricked into visiting harmful sites.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Users could be redirected to phishing sites or malware downloads, leading to credential theft, malware infection, or further attacks.
Likely Case
Attackers use it for phishing campaigns to steal credentials or deliver malware, exploiting user trust in the legitimate site.
If Mitigated
With proper controls like input validation and user awareness, impact is minimal, limited to potential annoyance or minor data exposure.
🎯 Exploit Status
Exploitation is straightforward but requires user interaction and authenticated access, limiting widespread abuse.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.16.0 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb23-18.html
Restart Required: Yes
Instructions:
1. Backup your AEM instance. 2. Download and install the patch from Adobe's security update page. 3. Restart the AEM service to apply changes. 4. Verify the update by checking the version.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to block or sanitize redirect URLs, preventing malicious redirects.
Configure web application firewall (WAF) rules to detect and block open redirect patterns.
🧯 If You Can't Patch
- Restrict low-privilege user access to minimize attack surface.
- Educate users about phishing risks and advise caution with unexpected redirects.
🔍 How to Verify
Check if Vulnerable:
Check the AEM version via the admin console or system info; if it's 6.5.15.0 or earlier, it's vulnerable.Check Version:
Use the AEM web interface or command: 'curl -s http://<aem-host>:<port>/system/console/status-productinfo' to check version.Verify Fix Applied:
After patching, confirm the version is 6.5.16.0 or later and test redirect functionality for validation.📡 Detection & Monitoring
Log Indicators:
- Look for unusual redirect patterns in access logs, such as requests with external URLs in parameters.
Network Indicators:
- Monitor for outbound connections to suspicious domains following AEM redirects.
SIEM Query:
Example: 'source="aem_logs" AND url="*redirect=*" AND url NOT CONTAINS "trusted-domain.com"'