Code execution via License Name SEH overwrite
Published Apr 29, 2026 · Updated Apr 29, 2026
Stack buffer overflow in Allok AVI to DVD SVCD VCD Converter 4.0.1217 allows local users to execute code via a crafted license name. The registration handler copies an oversized License Name string into a fixed-size stack buffer, overwriting the NSEH pointer and SEH handler. Exploitation requires local interaction with the registration dialog; clicking Register dispatches the overwritten handler and runs supplied shellcode in the application's user context.
Summary
What happened
Stack buffer overflow in Allok AVI to DVD SVCD VCD Converter 4.0.1217 allows local users to execute code via a crafted license name. The registration handler copies an oversized License Name string into a fixed-size stack buffer, overwriting the NSEH pointer and SEH handler. Exploitation requires local interaction with the registration dialog; clicking Register dispatches the overwritten handler and runs supplied shellcode in the application's user context.
The record
- CVE
- CVE-2018-25302
- Published
- Apr 29, 2026
- Updated
- Apr 29, 2026
- Vendor
- Allok Soft Inc.
- Product
- Allok AVI to DVD SVCD VCD Converter
- Classifications
- CWE-120, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 29, 2026CVE publishedPublication date reported by the CVE source.
- Apr 29, 2026Record 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=4.0.1217
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
- Allok AVI to DVD SVCD VCD Converter 4.0.1217 Buffer Overflow SEHfunctional · demonstrated
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Technologies
Your stack
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Your stack
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