Memory corruption via stream buffer size overflow
Published Apr 22, 2021 · Updated Aug 3, 2024
Integer overflow in Amazon Web Services FreeRTOS before 10.4.3 allows remote attackers to corrupt stream-buffer allocation sizes via crafted stream-buffer parameters. The prvInitialiseNewStreamBuffer function increments xBufferSizeBytes and adds StreamBuffer_t size before allocation without preventing arithmetic wraparound; the patch adds an overflow check and returns NULL on failure. Exploitation requires a reachable application to pass attacker-controlled stream-buffer sizing values, which can produce undersized allocations, heap corruption, crashes, or altered execution.
Summary
What happened
Integer overflow in Amazon Web Services FreeRTOS before 10.4.3 allows remote attackers to corrupt stream-buffer allocation sizes via crafted stream-buffer parameters. The prvInitialiseNewStreamBuffer function increments xBufferSizeBytes and adds StreamBuffer_t size before allocation without preventing arithmetic wraparound; the patch adds an overflow check and returns NULL on failure. Exploitation requires a reachable application to pass attacker-controlled stream-buffer sizing values, which can produce undersized allocations, heap corruption, crashes, or altered execution.
The record
- CVE
- CVE-2021-31572
- Published
- Apr 22, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 22, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Attacks
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Technologies
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