CVE-2019-25634
8.6
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 4Mhz | Base64 Decoder | 1.1.2 | affected |
Weaknesses
- CWE-787: Out-of-bounds Write
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: total
References
- https://www.exploit-db.com/exploits/46625
- http://4mhz.de/b64dec.html
- http://4mhz.de/download.php?file=b64dec-1-1-2.zip
- https://www.vulncheck.com/advisories/base64-decoder-local-buffer-overflow-seh-egghunter
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