Memory corruption via signed packet-length comparison
Published Mar 20, 2023 · Updated Aug 3, 2024
Buffer overflow in SORBAx64.dll in WellinTech KingHistorian 35.01.00.05 allows remote attackers to corrupt memory via a crafted packet. The RecvPacket path accepts a four-byte packet length above 0x80000000 because a signed comparison treats it as below the 0xfa00-byte stack-buffer limit, then passes the extracted value directly to memcpy. No authentication or user interaction is required, but exploitation depends on crafting the length and compression flags that reach the unsafe copy.
Summary
What happened
Buffer overflow in SORBAx64.dll in WellinTech KingHistorian 35.01.00.05 allows remote attackers to corrupt memory via a crafted packet. The RecvPacket path accepts a four-byte packet length above 0x80000000 because a signed comparison treats it as below the 0xfa00-byte stack-buffer limit, then passes the extracted value directly to memcpy. No authentication or user interaction is required, but exploitation depends on crafting the length and compression flags that reach the unsafe copy.
The record
- CVE
- CVE-2022-43663
- Published
- Mar 20, 2023
- Updated
- Aug 3, 2024
- Vendor
- WellinTech
- Product
- KingHistorian
- Classifications
- CWE-195, CWE-681, T0866
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 20, 2023CVE 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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Is a vulnerable build present?
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- Affected versionversion=35.01.00.05
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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