Memory corruption via undersized USB configuration descriptors
Published Oct 25, 2021 · Updated Aug 4, 2024
Buffer overflow in NXP MCUXpresso SDK 2.7.0 USB_HostProcessCallback() allows physically proximate attackers to access memory via USB. During USB device enumeration, the function trusts the configuration descriptor's attacker-controlled wTotalLength, accepts zero or undersized values, allocates an inadequate buffer, and reads bMaxPower beyond it. Exploitation requires a crafted USB device; the published research demonstrates out-of-bounds access but documents neither code execution nor field exploitation.
Summary
What happened
Buffer overflow in NXP MCUXpresso SDK 2.7.0 USB_HostProcessCallback() allows physically proximate attackers to access memory via USB. During USB device enumeration, the function trusts the configuration descriptor's attacker-controlled wTotalLength, accepts zero or undersized values, allocates an inadequate buffer, and reads bMaxPower beyond it. Exploitation requires a crafted USB device; the published research demonstrates out-of-bounds access but documents neither code execution nor field exploitation.
The record
- CVE
- CVE-2021-38258
- Published
- Oct 25, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1200
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Oct 25, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- MCUSec malformed USB configuration descriptor demonstrationproof of concept · demonstrated
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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