Server crash via off-by-one null terminator write
Published May 4, 2024 · Updated Aug 5, 2024
Buffer overflow in KashimAstro SimpleNetwork through 29bc615 allows remote attackers to crash the server via crafted TCP packets. TCPServer::Task writes a null terminator after received data fills the 40,960-byte global msg buffer, placing one byte beyond its end. No authentication or user interaction is required; the demonstrated consequence is process termination and service interruption, not data disclosure or modification.
Summary
What happened
Buffer overflow in KashimAstro SimpleNetwork through 29bc615 allows remote attackers to crash the server via crafted TCP packets. TCPServer::Task writes a null terminator after received data fills the 40,960-byte global msg buffer, placing one byte beyond its end. No authentication or user interaction is required; the demonstrated consequence is process termination and service interruption, not data disclosure or modification.
The record
- CVE
- CVE-2023-52729
- Published
- May 4, 2024
- Updated
- Aug 5, 2024
- Vendor
- KashimAstro
- Product
- SimpleNetwork
- Classifications
- CWE-120, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 4, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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=0 <=29bc615
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- SimpleNetwork oversized TCP packet proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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