CVE-2023-28379Public exploitNetwork attack vector

Code execution via unchecked form boundary length

Published Nov 14, 2023 · Updated Nov 4, 2025

Memory corruption in Weston Embedded uC-HTTP 3.01.01 allows remote attackers to execute code via a crafted HTTP form boundary. The HTTP request parser uses an unchecked boundary length as an index into a 72-byte heap buffer, causing a null-byte overwrite of adjacent allocator metadata. Exploitation requires enabled multipart form processing and attacker-influenced heap allocation; the resulting arbitrary write can corrupt code pointers or crash the server.

CVSS severity9.0
Critical
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory corruption in Weston Embedded uC-HTTP 3.01.01 allows remote attackers to execute code via a crafted HTTP form boundary. The HTTP request parser uses an unchecked boundary length as an index into a 72-byte heap buffer, causing a null-byte overwrite of adjacent allocator metadata. Exploitation requires enabled multipart form processing and attacker-influenced heap allocation; the resulting arbitrary write can corrupt code pointers or crash the server.

The record

CVE
CVE-2023-28379
Published
Nov 14, 2023
Updated
Nov 4, 2025
Vendor
Sigma Designs
Product
Gecko Platform
Classifications
CWE-787, CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sigma Designs · Gecko Platformversion=4.3.1.0
Weston Embedded Solutions · uC/HTTPversion=v3.01.01
Weston Embedded Solutions · Cs/NETversion=3.07.01

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo