Memory exhaustion via unreleased Hanzi decode buffer
Published May 10, 2023 · Updated Aug 2, 2024
A memory leak in OpenCV WeChat QR Code Module 4.0 through 4.7 allows remote attackers to exhaust memory via malformed Hanzi QR data. DecodedBitStreamParser::decodeHanziSegment allocates a buffer but returns without deleting it when a 13-bit read reports an error. Applications must pass attacker-controlled QR imagery into the module; repeated parse failures leak one buffer per attempt and can interrupt the consuming service.
Summary
What happened
A memory leak in OpenCV WeChat QR Code Module 4.0 through 4.7 allows remote attackers to exhaust memory via malformed Hanzi QR data. DecodedBitStreamParser::decodeHanziSegment allocates a buffer but returns without deleting it when a 13-bit read reports an error. Applications must pass attacker-controlled QR imagery into the module; repeated parse failures leak one buffer per attempt and can interrupt the consuming service.
The record
- CVE
- CVE-2023-2618
- Published
- May 10, 2023
- Updated
- Aug 2, 2024
- Vendor
- OpenCV
- Product
- OpenCV WeChat QR Code Module
- Classifications
- CWE-401, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 10, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.0
- Affected versionversion=4.1
- Affected versionversion=4.2
- Affected versionversion=4.3
- Affected versionversion=4.4
- Affected versionversion=4.5
- Affected versionversion=4.6
- Affected versionversion=4.7
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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