CVE-2023-24585 – An out-of-bounds write vulnerability in Weston ... (How to Fix)

Q: What is the severity of CVE-2023-24585?

CVE-2023-24585 has a CVSS score of 7.7 (HIGH). An out-of-bounds write vulnerability in Weston Embedded uC-HTTP v3.01.01 allows remote attackers to cause memory corruption via specially crafted HTTP packets. This affects systems using the vulnerable uC-HTTP server component. Successful exploitation could lead to denial of service or arbitrary code execution.

📋 TL;DR

An out-of-bounds write vulnerability in Weston Embedded uC-HTTP v3.01.01 allows remote attackers to cause memory corruption via specially crafted HTTP packets. This affects systems using the vulnerable uC-HTTP server component. Successful exploitation could lead to denial of service or arbitrary code execution.

💻 Affected Systems

Products:

Weston Embedded uC-HTTP

Versions: v3.01.01

Operating Systems: Any OS running uC-HTTP

Default Config Vulnerable: ⚠️ Yes

Notes: All deployments using the vulnerable HTTP server component are affected regardless of configuration.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, or ransomware deployment.

🟠

Likely Case

Denial of service causing service disruption or system crashes.

🟢

If Mitigated

Limited impact with proper network segmentation and exploit prevention controls.

🌐 Internet-Facing: HIGH - HTTP servers are typically internet-facing and the vulnerability requires only network access.

🏢 Internal Only: MEDIUM - Internal systems using uC-HTTP could be exploited by compromised internal hosts.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires crafting specific HTTP packets but no authentication is needed.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: v3.01.02 or later

Vendor Advisory: https://www.weston-embedded.com/security-advisories

Restart Required: Yes

Instructions:

1. Contact Weston Embedded for updated version. 2. Download and install uC-HTTP v3.01.02 or later. 3. Restart affected services. 4. Verify the update was successful.

🔧 Temporary Workarounds

Network Segmentation

all

Restrict network access to uC-HTTP servers using firewalls or network ACLs.

Disable HTTP Server

all

Temporarily disable the HTTP server functionality if not required.

🧯 If You Can't Patch

Implement strict network segmentation to isolate vulnerable systems
Deploy intrusion prevention systems (IPS) with rules to detect exploitation attempts

🔍 How to Verify

Check if Vulnerable:

Check uC-HTTP version in application configuration or via vendor documentation.

Check Version:

Check application configuration files or vendor-provided version query commands.

Verify Fix Applied:

Verify installed version is v3.01.02 or later and test HTTP functionality.

📡 Detection & Monitoring

Log Indicators:

Unusual HTTP request patterns
Server crashes or restarts
Memory corruption errors in logs

Network Indicators:

Malformed HTTP packets targeting uC-HTTP servers
Unusual traffic to HTTP ports

SIEM Query:

source="uC-HTTP" AND (event="crash" OR event="memory_error" OR http_request contains malformed_pattern)

📊 Metadata

CVE ID: CVE-2023-24585

CVSS v3 Score: 7.7 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

CWE: CWE-119

Published: November 14, 2023

Last Updated: November 21, 2024

🔗 References

https://talosintelligence.com/vulnerability_reports/TALOS-2023-1725 Exploit,Technical Description,Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1725 Exploit,Technical Description,Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1725

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