Stack-data disclosure via full-buffer static-file writes
Published Aug 22, 2022 · Updated Aug 3, 2024
Information disclosure in Crow through 1.0+4 allows remote attackers to read uninitialized stack data via small static files. Connection::do_write_static passes its entire 16,384-byte local buffer to asio::buffer without limiting the write to the bytes actually read. The server must expose a configured static path containing a file smaller than 16 KB; requesting that file returns its contents followed by residual stack memory.
Summary
What happened
Information disclosure in Crow through 1.0+4 allows remote attackers to read uninitialized stack data via small static files. Connection::do_write_static passes its entire 16,384-byte local buffer to asio::buffer without limiting the write to the bytes actually read. The server must expose a configured static path containing a file smaller than 16 KB; requesting that file returns its contents followed by residual stack memory.
The record
- CVE
- CVE-2022-38668
- Published
- Aug 22, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-908, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 22, 2022CVE 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 conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Crowbleed static-file disclosure proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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