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CVE-2019-25634
HIGH8.4
Description
Base64 Decoder 1.1.2 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overwrite. Attackers can craft a malicious input file that overflows a buffer, overwrites the SEH chain with a POP-POP-RET gadget address, and uses an egghunter payload to locate and execute shellcode for code execution.
CVE Details
CVSS v3.1 Score8.4
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published3/24/2026
Last Modified3/24/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-787
References
http://4mhz.de/b64dec.html(disclosure@vulncheck.com)
http://4mhz.de/download.php?file=b64dec-1-1-2.zip(disclosure@vulncheck.com)
https://www.exploit-db.com/exploits/46625(disclosure@vulncheck.com)
https://www.vulncheck.com/advisories/base64-decoder-local-buffer-overflow-seh-egghunter(disclosure@vulncheck.com)
IOC Correlations
No correlations recorded
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