Heap corruption via unchecked calloc multiplication
Published May 3, 2022 · Updated Apr 16, 2025
Integer wraparound in calloc in eCosCentric eCosPro RTOS 2.0.1 through 4.5.3 allows local users to corrupt heap memory. The calloc implementation fails to validate the product of its element-count and element-size arguments, so an oversized request wraps to a small allocation before associated data exceeds that buffer. Exploitation requires high privileges, user interaction, and attacker-influenced allocation input; successful writes can corrupt memory or interrupt the target.
Summary
What happened
Integer wraparound in calloc in eCosCentric eCosPro RTOS 2.0.1 through 4.5.3 allows local users to corrupt heap memory. The calloc implementation fails to validate the product of its element-count and element-size arguments, so an oversized request wraps to a small allocation before associated data exceeds that buffer. Exploitation requires high privileges, user interaction, and attacker-influenced allocation input; successful writes can corrupt memory or interrupt the target.
The record
- CVE
- CVE-2021-27417
- Published
- May 3, 2022
- Updated
- Apr 16, 2025
- Vendor
- eCosCentric
- Product
- eCosPro RTOS
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- May 3, 2022CVE publishedPublication date reported by the CVE source.
- Apr 16, 2025Record 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=2.0.1 <=4.5.3
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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