Login Sign Up

CVE-2021-2453

7.5 HIGH
Denial of Service

📋 TL;DR

This vulnerability in Oracle Outside In Technology allows unauthenticated attackers to cause denial of service by crashing or hanging the software. It affects Oracle Fusion Middleware using Outside In Filters version 8.5.5. Organizations using Oracle products that incorporate this SDK are vulnerable if they process untrusted data.

💻 Affected Systems

Products:
  • Oracle Fusion Middleware (Outside In Filters component)
  • Any software using Oracle Outside In Technology SDK
Versions: 8.5.5
Operating Systems: All platforms supported by Oracle Outside In Technology
Default Config Vulnerable: ⚠️ Yes
Notes: Vulnerability exists in the SDK itself, so any application using Outside In Technology 8.5.5 is affected regardless of configuration.

📦 What is this software?

Outside In Technology by Oracle

View all CVEs affecting Outside In Technology →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete denial of service for any application using Outside In Technology, potentially affecting multiple business processes that rely on document processing capabilities.

🟠

Likely Case

Service disruption for specific applications using Outside In Technology when processing malicious files, leading to temporary unavailability.

🟢

If Mitigated

Limited impact if proper network segmentation and input validation are implemented, restricting exposure to trusted sources only.

🌐 Internet-Facing: HIGH - Unauthenticated network access via HTTP makes internet-facing systems particularly vulnerable to DoS attacks.
🏢 Internal Only: MEDIUM - Internal systems are still vulnerable but require attacker access to internal network.

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ⚠️ Yes
Complexity: LOW

Oracle describes it as 'easily exploitable' with no authentication required via HTTP.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Later than 8.5.5 (check specific Oracle product updates)

Vendor Advisory: https://www.oracle.com/security-alerts/cpujul2021.html

Restart Required: Yes

Instructions:

1. Apply Oracle Critical Patch Update for July 2021. 2. Update affected Oracle products. 3. Restart services using Outside In Technology. 4. Verify patch application.

🔧 Temporary Workarounds

Network Segmentation

all

Restrict network access to systems using Outside In Technology to trusted sources only

Input Validation

all

Implement strict file type validation and sanitization before passing data to Outside In Technology

🧯 If You Can't Patch

  • Implement network controls to restrict HTTP access to affected systems
  • Monitor for abnormal process crashes or hangs in applications using Outside In Technology

🔍 How to Verify

Check if Vulnerable:

Check Oracle product documentation for Outside In Technology version. If version is 8.5.5, system is vulnerable.

Check Version:

Check Oracle product-specific version commands or consult Oracle documentation

Verify Fix Applied:

Verify Oracle product version is updated beyond 8.5.5 and July 2021 Critical Patch Update is applied.

📡 Detection & Monitoring

Log Indicators:

  • Multiple process crashes/hangs in Outside In Technology components
  • Abnormal termination of document processing services

Network Indicators:

  • HTTP requests to Outside In Technology endpoints followed by service disruption

SIEM Query:

Process termination events for oracle* or outsidein* processes with abnormal exit codes

📊 Metadata

CVE ID: CVE-2021-2453
CVSS v3 Score: 7.5 (HIGH)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: July 21, 2021
Last Updated: November 21, 2024

🔗 References

📤 Share & Export

📄 Export Markdown 📋 Export JSON