Memory corruption via stale pointers after reallocation
Published Feb 18, 2021 · Updated Aug 3, 2024
Use-after-free in the yottadb Rust crate before 1.2.0 allows attackers to trigger undefined behavior during database traversal. The subscript_next and subscript_prev wrappers can retain a pointer after reallocating an undersized variable or subscript buffer, then pass that freed address to ydb_subscript_next_st or ydb_subscript_prev_st. An application must call an affected wrapper with insufficient initial storage; the resulting undefined behavior can corrupt memory or crash the process.
Summary
What happened
Use-after-free in the yottadb Rust crate before 1.2.0 allows attackers to trigger undefined behavior during database traversal. The subscript_next and subscript_prev wrappers can retain a pointer after reallocating an undersized variable or subscript buffer, then pass that freed address to ydb_subscript_next_st or ydb_subscript_prev_st. An application must call an affected wrapper with insufficient initial storage; the resulting undefined behavior can corrupt memory or crash the process.
The record
- CVE
- CVE-2021-27377
- Published
- Feb 18, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-416
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 18, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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
- RustSec undefined-behavior demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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