CVE-2023-0847Network attack vector

Remote memory corruption via oversized DASH7 packets

Published Feb 28, 2023 · Updated Jan 16, 2025

Out-of-bounds write in the DASH7 packet handler in Sub-IoT Stack before 0.5.0 allows remote attackers to corrupt memory via a crafted packet. Packet processing writes as many as 255 bytes beyond a statically allocated packet-queue structure instead of enforcing its bound. Default builds reach only allocated but unused memory; a queue size of two exposes other memory and leads to a crash or remote code execution.

CVSS severity5.3
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the DASH7 packet handler in Sub-IoT Stack before 0.5.0 allows remote attackers to corrupt memory via a crafted packet. Packet processing writes as many as 255 bytes beyond a statically allocated packet-queue structure instead of enforcing its bound. Default builds reach only allocated but unused memory; a queue size of two exposes other memory and leads to a crash or remote code execution.

The record

CVE
CVE-2023-0847
Published
Feb 28, 2023
Updated
Jan 16, 2025
Vendor
Sub-IoT
Product
Sub-IoT Stack
Classifications
CWE-787, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <0.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sub-IoT · Sub-IoT Stackversion=0 <0.5.0

Published CVSS scores

8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T0866Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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