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Advanced Software FrameworkApplication · Microchip

CVE-2024-7490

CRITICAL · 9.8 CVSS v3.1 Published 2024-08-08
Fix available
A fix is available. Upgrade to after 3.52.0.2574 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper Input Validation vulnerability in Microchip Techology Advanced Software Framework example DHCP server can cause remote code execution through a buffer overflow. This vulnerability is associated with program files tinydhcpserver.C and program routines lwip_dhcp_find_option. This issue affects Advanced Software Framework: through 3.52.0.2574. ASF is no longer being supported. Apply provided workaround or migrate to an actively maintained framework.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Buffer overflow in the lwip_dhcp_find_option routine of the Microchip ASF example DHCP server allows remote attackers to achieve RCE by sending specially crafted DHCP packets with malformed options that overflow internal buffers during option parsing.

MitigationMigrate from the unsupported ASF to an actively maintained framework, or implement input validation and bounds checking in the DHCP option parsing logic to prevent buffer overflows; the vendor recommends applying provided workarounds if available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Advanced Software FrameworkApplication
Affected:<= 3.52.0.2574

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Microchip ASF is in use
    Search project files for references to 'ASF', 'Advanced Software Framework', or check build artifacts for Microchip ASF libraries. Look for ASF-version.h or similar version headers in the codebase or embedded firmware image.
    Affected if The codebase or firmware contains Microchip Advanced Software Framework components.
  2. Determine ASF version
    Locate the ASF version header (typically asf_version.h or version.h in ASF directories) and read the version number. Compare against <= 3.52.0.2574.
    Affected if The installed ASF version is 3.52.0.2574 or lower.
  3. Verify DHCP server code is present
    Search source code for references to 'dhcp', 'lwip_dhcp', or DHCP server implementation files. Check for inclusion of lwip DHCP header files (dhcp.h, dhcp_server.h) in the project.
    Affected if The project includes DHCP server implementation code using lwIP.
  4. Confirm lwip_dhcp_find_option is compiled
    Search for the function name 'lwip_dhcp_find_option' in source files or examine the compiled binary/elf for this symbol. Check for DHCP option parsing logic in the build.
    Affected if The lwip_dhcp_find_option function exists in the source or compiled firmware.
  5. Check if DHCP packets from untrusted sources are processed
    Review network configuration and firewall rules to determine if the device accepts DHCP requests from external or untrusted network segments.
    Affected if The DHCP server accepts and processes packets from untrusted or external network sources.

You are affected if your firmware uses Microchip ASF version 3.52.0.2574 or lower, includes the lwIP DHCP server with the vulnerable lwip_dhcp_find_option function, and processes DHCP packets from untrusted network sources.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 3.52.0.2574
Interim mitigation

Migrate from the unsupported ASF to an actively maintained framework, or implement input validation and bounds checking in the DHCP option parsing logic to prevent buffer overflows; the vendor recommends applying provided workarounds if available.

Fix this in Advanced Software Framework Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing12.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,760
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-7490 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data