Heap corruption via wrapped mempool allocation size
Published May 24, 2021 · Updated Sep 16, 2024
Integer overflow in Zephyr RTOS 1.14.2 and 2.4.0 allows physically proximate attackers to corrupt heap memory through oversized allocations. sys_mem_pool_alloc adds allocator metadata to an untrusted size without checking for wraparound, so malloc can return a seven-byte block for a 0xffffffff-byte request. Reaching the flaw requires a code path that passes an attacker-controlled size to malloc; the resulting overwrite can alter memory or interrupt the device.
Summary
What happened
Integer overflow in Zephyr RTOS 1.14.2 and 2.4.0 allows physically proximate attackers to corrupt heap memory through oversized allocations. sys_mem_pool_alloc adds allocator metadata to an untrusted size without checking for wraparound, so malloc can return a seven-byte block for a 0xffffffff-byte request. Reaching the flaw requires a code path that passes an attacker-controlled size to malloc; the resulting overwrite can alter memory or interrupt the device.
The record
- CVE
- CVE-2020-13603
- Published
- May 24, 2021
- Updated
- Sep 16, 2024
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- CWE-190
- Attack vector
- physical
- Privileges
- Unavailable
Timeline
How it unfolded
- May 24, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
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- Affected versionversion=1.14.2 <unspecified
- Affected versionversion=2.4.0 <unspecified
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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