Memory exposure via uninitialized AsyncRead buffer
Published Aug 8, 2021 · Updated Aug 4, 2024
Use of uninitialized memory in libp2p-deflate before 0.27.1 allows attackers to expose process memory through AsyncRead operations. DeflateOutput extends its output buffer without zeroing the new region before passing it to user-provided AsyncRead::poll_read. Exploitation requires a consuming application to supply an AsyncRead implementation that inspects the buffer; this exposes residual memory and can trigger undefined behavior.
Summary
What happened
Use of uninitialized memory in libp2p-deflate before 0.27.1 allows attackers to expose process memory through AsyncRead operations. DeflateOutput extends its output buffer without zeroing the new region before passing it to user-provided AsyncRead::poll_read. Exploitation requires a consuming application to supply an AsyncRead implementation that inspects the buffer; this exposes residual memory and can trigger undefined behavior.
The record
- CVE
- CVE-2020-36443
- Published
- Aug 8, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-908
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 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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Public exploit references
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Technologies
Your stack
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