CVE-2020-37124 - CVE House
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Status published High CVE-2020-37124

B64dec 1.1.2 - Buffer Overflow (SEH Overflow + Egg Hunter)

Vulnerability Description

B64dec 1.1.2 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) with crafted input. Attackers can leverage an egg hunter technique and carefully constructed payload to inject and execute malicious code during base64 decoding process.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Andy Bowden

References

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CVE-2019-25634
Base64 Decoder 1.1.2 Local Buffer Overflow SEH Egghunter
High 8.6

Affected Vendor

Affected Software

B64dec
Vulnerable Versions:
1.1.2

Timeline

Official Publish: February 5th, 2026
Last Modified: February 6th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-121

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control
T1485 Data Destruction
Impact