Memory corruption via calloc size overflow
Published May 12, 2021 · Updated Aug 4, 2024
Integer overflow in Wind River VxWorks 7 before 21.03 allows remote attackers to corrupt memory via crafted calloc size calculations. The allocator can overflow while calculating the block size, return a buffer smaller than the requested allocation, and permit writes beyond that buffer. Exploitation requires a reachable code path that passes attacker-controlled allocation dimensions; successful exploitation can corrupt memory and affect confidentiality, integrity, and availability.
Summary
What happened
Integer overflow in Wind River VxWorks 7 before 21.03 allows remote attackers to corrupt memory via crafted calloc size calculations. The allocator can overflow while calculating the block size, return a buffer smaller than the requested allocation, and permit writes beyond that buffer. Exploitation requires a reachable code path that passes attacker-controlled allocation dimensions; successful exploitation can corrupt memory and affect confidentiality, integrity, and availability.
The record
- CVE
- CVE-2020-35198
- Published
- May 12, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 12, 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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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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