Code execution via unchecked worksheet format copy
Published Sep 5, 2022 · Updated Aug 3, 2024
Stack-based buffer overflow in Lotus 1-2-3 R3 through 9.8.2 and 123elf before 1.0.0rc3 allows attackers to execute code via a crafted worksheet. In process_fmt(), a WK3 w3r_format element supplies attacker-controlled data and length to a copy routine that writes into a 1,024-byte stack buffer without checking the destination size. Exploitation requires a victim to open the malicious worksheet, after which the overwritten return address permits code execution with the application's privileges.
Summary
What happened
Stack-based buffer overflow in Lotus 1-2-3 R3 through 9.8.2 and 123elf before 1.0.0rc3 allows attackers to execute code via a crafted worksheet. In process_fmt(), a WK3 w3r_format element supplies attacker-controlled data and length to a copy routine that writes into a 1,024-byte stack buffer without checking the destination size. Exploitation requires a victim to open the malicious worksheet, after which the overwritten return address permits code execution with the application's privileges.
The record
- CVE
- CVE-2022-39843
- Published
- Sep 5, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, CWE-121, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 5, 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 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
- exploit.wk3 return-address overwrite proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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