Critical

Out-of-Bounds Write in Azure RTOS NetX Duo IGMP Protocol (CVE-2023-48691)

IdentifiersCVE-2023-48691CWE-787· Out-of-bounds Write

CVE-2023-48691 is an out-of-bounds write vulnerability in the IGMP protocol implementation of Azure RTOS NetX Duo (v6.2.1 and below). The flaw allows an attacker to write outside the bounds of allocated memory, potentially leading to remote code execution. This vulnerability is present in embedded and IoT devices, including Rockwell Automation Micro800 PLCs, due to their use of the affected NetX Duo versions.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows remote attackers to execute arbitrary code on affected devices, potentially compromising the integrity, availability, and confidentiality of critical infrastructure systems. The vulnerability is remotely exploitable with low attack complexity and affects widely deployed PLCs in sectors such as energy, manufacturing, and water management.

Mitigation

If you can’t patch tonight, do this now.

There are no known workarounds for this vulnerability. As interim measures, minimize network exposure of affected devices, segment control system networks, use firewalls to restrict access, and ensure remote access is secured with up-to-date VPNs. Follow Rockwell Automation and CISA security best practices and monitor for suspicious activity.

Remediation

Patch, then assume compromise.

Upgrade Azure RTOS NetX Duo to version 6.3.0 or later, which contains the fix for this vulnerability. For Rockwell Automation Micro800 PLCs, apply the latest available firmware updates (V23.011 or later for affected models) as provided by the vendor.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationAzure Rtos Netx Duooperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2023-48691

NVD

nvd.nist.gov/vuln/detail/CVE-2023-48691

MITRE CWE · CWE-787

Out-of-bounds Write

Third Party Advisory

github.com/azure-rtos/netxduo/security/advisories/GHSA-fwmg-rj6g-w99p